function validate() {
    f = document.forms[0].first_name1.value.match(/\w/);
    l = document.forms[0].last_name1.value.match(/\w/);
    
    if( !f || !l ) {
        alert("Please enter a name");
        return false;
    }
    return true;
}

var person_count = 2;

function more_people() {
    var first_name = new Array();
    var last_name  = new Array();
    var address1   = new Array();
    var address2   = new Array();
    var town       = new Array();
    var state      = new Array();
    var zip        = new Array();
    var email      = new Array();
    var phone      = new Array();
    var i;

    if( person_count > 2 ) {
        for( i=3; i<=person_count; i++ ) {
            first_name[i] = document.getElementById('first_name'+i).value;
            last_name[i]  = document.getElementById('last_name'+i).value;
            address1[i]   = document.getElementById('address1_'+i).value;
            address2[i]   = document.getElementById('address2_'+i).value;
            town[i]       = document.getElementById('town'+i).value;
            state[i]      = document.getElementById('state'+i).value;
            zip[i]        = document.getElementById('zip'+i).value;
            email[i]      = document.getElementById('email'+i).value;
            phone[i]      = document.getElementById('phone'+i).value;
        }
    }
    var content_block = '';
    for( i=3; i<=person_count; i++ ) {
        content_block += '<p><b>Person '+i+'</b></p>';
        content_block += '<table cellspacing="0" cellpadding="0" border="0" width="100%">';
        content_block += '<tr><td class="table_underscore">First Name, Last Name:</td>';
        content_block += '<td class="table_underscore" align="right">';
        content_block += '<input type="text" name="first_name'+i+'" id="first_name'+i+'" size="20" maxlength="100" ';
        content_block += 'value="'+first_name[i]+'" />';
        content_block += '<input type="text" name="last_name'+i+'" id="last_name'+i+'" size="20" value="'+last_name[i]+'" />';
        content_block += '</td></tr><tr><td class="table_underscore">Street Address: &nbsp;</td>';
        content_block += '<td class="table_underscore" align="right">';
        content_block += '<input type="text" name="address1_'+i+'" id="address1_'+i+'" size="43" value="'+address1[i]+'" /><br>';
        content_block += '<input type="text" name="address2_'+i+'" id="address2_'+i+'" size="43" value="'+address2[i]+'" />';
        content_block += '</td></tr><tr><td class="table_underscore">Town or City: &nbsp;</td>';
        content_block += '<td class="table_underscore" align="right">';
        content_block += '<input type="text" name="town'+i+'" id="town'+i+'" size="20" maxlength="100" value="'+town[i]+'" />';
        content_block += '</td></tr><tr><td class="table_underscore">';
        content_block += 'State, Zip: &nbsp;</td><td class="table_underscore" align="right">';
        content_block += '<input type="text" name="state'+i+'" id="state'+i+'" size="2" maxlength="15" value="'+state[i]+'" />, &nbsp;';
        content_block += '<input type="text" name="zip'+i+'" id="zip'+i+'" size="10" maxlength="10" value="'+zip[i]+'" />';
        content_block += '</td></tr><tr><td class="table_underscore">';
        content_block += 'Email Address:</td><td class="table_underscore" align="right">';
        content_block += '<input type="text" name="email'+i+'" id="email'+i+'" size="43" maxlength="70" value="'+email[i]+'" />';
        content_block += '</td></tr><tr><td class="table_underscore">';
        content_block += 'Phone:</td><td class="table_underscore" align="right">';
        content_block += '<input type="text" name="phone'+i+'" id="phone'+i+'" size="43" maxlength="70" value="'+phone[i]+'" />';
        content_block += '</td></tr></table><br />';
    }
    person_count++;
    content_block += '<p><b>Person '+person_count+'</b></p>';
    content_block += '<table cellspacing="0" cellpadding="0" border="0" width="100%">';
    content_block += '<tr><td class="table_underscore">First Name, Last Name:</td>';
    content_block += '<td class="table_underscore" align="right">';
    content_block += '<input type="text" name="first_name'+person_count+'" id="first_name'+person_count+'" size="20" maxlength="100" />';
    content_block += '<input type="text" name="last_name'+person_count+'" id="last_name'+person_count+'" size="20" />';
    content_block += '</td></tr><tr><td class="table_underscore">Street Address: &nbsp;</td>';
    content_block += '<td class="table_underscore" align="right">';
    content_block += '<input type="text" name="address1_'+person_count+'" id="address1_'+person_count+'" size="43" /><br>';
    content_block += '<input type="text" name="address2_'+person_count+'" id="address2_'+person_count+'" size="43" />';
    content_block += '</td></tr><tr><td class="table_underscore">Town or City: &nbsp;</td>';
    content_block += '<td class="table_underscore" align="right">';
    content_block += '<input type="text" name="town'+person_count+'" id="town'+person_count+'" size="20" maxlength="100" />';
    content_block += '</td></tr><tr><td class="table_underscore">';
    content_block += 'State, Zip: &nbsp;</td><td class="table_underscore" align="right">';
    content_block += '<input type="text" name="state'+person_count+'" id="state'+person_count+'" size="2" maxlength="15" />, &nbsp;';
    content_block += '<input type="text" name="zip'+person_count+'" id="zip'+person_count+'" size="10" maxlength="10" />';
    content_block += '</td></tr><tr><td class="table_underscore">';
    content_block += 'Email Address:</td><td class="table_underscore" align="right">';
    content_block += '<input type="text" name="email'+person_count+'" id="email'+person_count+'" size="43" maxlength="70" />';
    content_block += '</td></tr><tr><td class="table_underscore">';
    content_block += 'Phone:</td><td class="table_underscore" align="right">';
    content_block += '<input type="text" name="phone'+person_count+'" id="phone'+person_count+'" size="43" maxlength="70" />';
    content_block += '</td></tr></table><br />';
    content_block += '<input type="button" value="Register More People&hellip;" onclick="more_people();" />';

    document.getElementById('more_people').innerHTML = content_block;
}

NacreData = window.NacreData = {
  total : 0,
  is_preregister : false, 
  pre_discount : 0,
  update_total : function() {
    var t = NacreData.total.toString();
    if( NacreData.pre_discount > 0 ) {
      t += ' ($' + NacreData.pre_discount.toString() 
        +  ' pre-registration discount applied)';
    }
    jQuery(".running_total").html(t);
  },
  addup : function() {  
   var work_hours = parseFloat( jQuery("#work").val() );

  NacreData.pre_discount = 0;

   if( work_hours > 0 ) {

      var reg_converted = 0;
      var reg_cost      = 0;

      /* Work Hours are calculated against full-cost registrations only, so
      any low-income registrations are first converted to full-cost */

      if( parseInt( jQuery("#full_low").val() ) > 0 ) {
        reg_converted = 1;
        var full = jQuery("#full_regular").val();
        full    += jQuery("#full_low").val();
        jQuery("#full_low").val("");
        jQuery("#full_regular").val(full);
        reg_cost += parseInt( jQuery("#full_regular").val() ) * 40;
      }
      /** TODO comment-out or combine saturday_low and sunday_low to just be the "1 Day Only" options (one for member and one for non-member **/
      if( parseInt( jQuery("#friday_low").val() ) > 0 ) {
	reg_converted = 1;
	var full = parseInt( jQuery("#friday").val() );
	full	+= parseInt( jQuery("#friday_low").val() );
	jQuery("#friday_low").val("");
	jQuery("#friday").val(full);
        reg_cost += parseInt( jQuery("#friday").val() )      * 20;
      }
      if( parseInt( jQuery("#saturday_low").val() ) > 0 ) {
        reg_converted = 1;
        var full = parseInt( jQuery("#saturday").val() );
        full    += parseInt( jQuery("#saturday_low").val() );
        jQuery("#saturday_low").val("");
        jQuery("#saturday").val(full);
        reg_cost += parseInt( jQuery("#saturday").val() ) * 20;
      }
      
      if( parseInt( jQuery("#sunday_low").val() ) > 0 ) {
        reg_converted = 1;
        var full = parseInt( jQuery("#sunday").val() );
        full    += parseInt( jQuery("#sunday_low").val() );
        jQuery("#sunday_low").val("");
        jQuery("#sunday").val(full);
        reg_cost += parseInt( jQuery("#sunday").val() ) * 20;
      }
      
      if( parseInt( jQuery("#full_member").val() ) > 0 ) {
        reg_cost += parseInt( jQuery("#full_member").val() ) * 30;
      }
      
      if( 1 == reg_converted ) {
        alert("Work Hours are calculated against full-cost registrations only; Your registration categories have been adjusted" );
      }

    }

    NacreData.total = 0;
    var coop	    = jQuery("#coop").val();
    var coop_discount = 0;
    var need_howto  = 0;
    jQuery("#howto").html('<b>In the following blanks, please enter the number of people for which that item applies (number of registrations, meals, beds, etc.)</b>' );

    if( coop > person_count ) {
      need_howto = 1;
      jQuery("#coop").val('');
    }

    var full_member = parseInt( jQuery("#full_member").val() );
    if( full_member > 0 ) {
      NacreData.total  = full_member * 30;
      if( full_member >= 30 ) {
        need_howto = 1;
      }
    }
    
    var full_regular = parseInt( jQuery("#full_regular").val() );
    if( full_regular > 0 ) {
      NacreData.total += full_regular * 40;
      if( full_regular > 30 ) {
        need_howto = 1;
      }
    }
        
    var friday = parseInt( jQuery("#friday").val() );
    if( friday > 0 ) {
      NacreData.total += friday * 20;      
      if( friday >= 20 ) {
      	need_howto = 1;
      }
    }
    if( parseInt( jQuery("#friday_low").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#friday_low").val() ) * 15;
    }
    
    var saturday = parseInt( jQuery("#saturday").val() );
    if( saturday > 0 ) {
      NacreData.total += saturday * 20;
      if( saturday >= 20 ) {
        need_howto = 1;
      }
    }
    if( parseInt( jQuery("#saturday_low").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#saturday_low").val() ) * 15;
    }
    
    var sunday = parseInt( jQuery("#sunday").val() );
    if( sunday > 0 ) {
      NacreData.total += sunday * 20;
      if( sunday >= 20 ) {
        need_howto = 1;
      }
    }
    if( parseInt( jQuery("#sunday_low").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sunday_low").val() )  * 15;
    }
    if( parseInt( jQuery("#membership").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#membership").val() )	* 20;
    }

    if( parseInt( jQuery("#male_cabin").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#male_cabin").val() )	* 51;
    }
    if( parseInt( jQuery("#female_cabin").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#female_cabin").val() )	* 51;
    }
    if( parseInt( jQuery("#family_cabin").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#family_cabin").val() ) 	* 51;
    }
    if( parseInt( jQuery("#coed_cabin").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#coed_cabin").val() )	* 51;
    }
    if( parseInt( jQuery("#camping").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#camping").val() )		* 6;
    }

    
    if( parseInt( jQuery("#full_meals").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#full_meals").val() ) * 75;
	    coop_discount += Math.min(coop,parseInt( jQuery("#full_meals").val() )) * 9;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#full_meals").val() ) * 9;
	      NacreData.pre_discount += parseInt( jQuery("#full_meals").val() ) * 9;
	    }
    }
    if( parseInt( jQuery("#full_meals_child").val() ) > 0 ) {
      NacreData.total += (parseInt( jQuery("#full_meals_child").val() ) * 40);
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#full_meals_child").val() ) * 9;
	      NacreData.pre_discount += parseInt( jQuery("#full_meals").val() ) * 9;
	    }
    }
    if( parseInt( jQuery("#friday_dinner").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#friday_dinner").val() ) * 11;
	    coop_discount += Math.min(coop,parseInt( jQuery("#friday_dinner").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#friday_dinner").val() );
	      NacreData.pre_discount += parseInt( jQuery("#friday_dinner").val() );
	    }
    }
    if( parseInt( jQuery("#friday_dinner_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#friday_dinner_child").val() ) * 8;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#friday_dinner_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#friday_dinner_child").val() );
	    }
    }
    if( parseInt( jQuery("#saturday_breakfast").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#saturday_breakfast").val() )  * 7;
      coop_discount += Math.min(coop,parseInt( jQuery("#saturday_breakfast").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#saturday_breakfast").val() );
	      NacreData.pre_discount += parseInt( jQuery("#saturday_breakfast").val() );
	    }
    }
    if( parseInt( jQuery("#sat_breakfast_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sat_breakfast_child").val() ) * 4;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sat_breakfast_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sat_breakfast_child").val() );
	    }
    }
    if( parseInt( jQuery("#saturday_lunch").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#saturday_lunch").val() ) * 9;
      coop_discount += Math.min( coop, parseInt( jQuery("#saturday_lunch").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#saturday_lunch").val() );
	      NacreData.pre_discount += parseInt( jQuery("#saturday_lunch").val() );
	    }
    }
    if( parseInt( jQuery("#sat_lunch_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sat_lunch_child").val() )     * 6;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sat_lunch_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sat_lunch_child").val() );
	    }
    }
    if( parseInt( jQuery("#saturday_dinner").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#saturday_dinner").val() )     * 11;
      coop_discount += Math.min( coop, parseInt( jQuery("#saturday_dinner").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#saturday_dinner").val() );
	      NacreData.pre_discount += parseInt( jQuery("#saturday_dinner").val() );
	    }
    }
    if( parseInt( jQuery("#sat_dinner_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sat_dinner_child").val() ) * 8;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sat_dinner_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sat_dinner_child").val() );
	    }
    }
    if( parseInt( jQuery("#sunday_breakfast").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sunday_breakfast").val() ) * 7;
    	coop_discount += Math.min(coop,parseInt( jQuery("#sunday_breakfast").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sunday_breakfast").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sunday_breakfast").val() );
	    }
    }
    if( parseInt( jQuery("#sun_breakfast_child").val() ) > 0 ) { 
      NacreData.total += parseInt( jQuery("#sun_breakfast_child").val() ) * 4;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sun_breakfast_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sun_breakfast_child").val() );
	    }
    }
    if( parseInt( jQuery("#sunday_lunch").val() )  > 0 ) {
      NacreData.total += parseInt( jQuery("#sunday_lunch").val() )        * 9;
    	coop_discount += Math.min(coop,parseInt( jQuery("#sunday_lunch").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sunday_lunch").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sunday_lunch").val() );
	    }
    }
    if( parseInt( jQuery("#sun_lunch_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sun_lunch_child").val() )     * 6;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sun_lunch_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sun_lunch_child").val() );
	    }
    }
    if( parseInt( jQuery("#sunday_dinner").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sunday_dinner").val() )       * 11;
    	coop_discount += Math.min(coop,parseInt( jQuery("#sunday_dinner").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sunday_dinner").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sunday_dinner").val() );
	    }
    }
    if( parseInt( jQuery("#sun_dinner_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#sun_dinner_child").val() )    * 8;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#sun_dinner_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#sun_dinner_child").val() );
	    }
    }
    if( parseInt( jQuery("#monday_breakfast").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#monday_breakfast").val() )    * 7;
    	coop_discount += Math.min(coop,parseInt( jQuery("#monday_breakfast").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#monday_breakfast").val() );
	      NacreData.pre_discount += parseInt( jQuery("#monday_breakfast").val() );
	    }
    }
    if( parseInt( jQuery("#mon_breakfast_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#mon_breakfast_child").val() ) * 4;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#mon_breakfast_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#mon_breakfast_child").val() );
	    }
    }
    if( parseInt( jQuery("#monday_lunch").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#monday_lunch").val() ) * 9;
    	coop_discount += Math.min(parseInt( jQuery("#monday_lunch").val() ));
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#monday_lunch").val() );
	      NacreData.pre_discount += parseInt( jQuery("#monday_lunch").val() );
	    }
    }
    if( parseInt( jQuery("#mon_lunch_child").val() ) > 0 ) {
      NacreData.total += parseInt( jQuery("#mon_lunch_child").val() ) * 6;
	    if( NacreData.is_preregister ) {
	      NacreData.total -= parseInt( jQuery("#mon_lunch_child").val() );
	      NacreData.pre_discount += parseInt( jQuery("#mon_lunch_child").val() );
	    }
    }
    if( parseInt( jQuery("#work").val() ) > 0 ) {
      NacreData.total -= (parseFloat( jQuery("#work").val() ) * 18);
    }
    if( parseInt( coop_discount ) > 0 ) {
      NacreData.total -= (parseFloat( coop_discount ));
    }
    if( parseInt( jQuery("#donation").val() ) > 0 ) {
      NacreData.total += parseFloat( jQuery("#donation").val() );
    } 
    
    NacreData.update_total();
    
    if( 1 == need_howto ) {
      NacreData.howto();
    }
  },
  howto : function() {
    jQuery("#howto").css( 'border', 'solid #f00' );
    jQuery("#howto").css( 'padding', '8px;' );
    jQuery("#howto").css( 'font-size', '1.5em' );
    var html = jQuery("#howto").html();
    html += " &mdash; not the dollar amount (dollar amounts will be calculated for you)";
    jQuery("#howto").html(html);
    jQuery("#howto").focus();
  }
};

jQuery(document).ready(
  function() {
    jQuery("#full_member").change( NacreData.addup );
    jQuery("#full_regular").change( NacreData.addup );
    jQuery("#friday").change( NacreData.addup );
    jQuery("#friday_low").change( NacreData.addup );
    jQuery("#saturday").change( NacreData.addup );
    jQuery("#saturday_low").change( NacreData.addup );
    jQuery("#sunday").change( NacreData.addup );
    jQuery("#sunday_low").change( NacreData.addup );
    jQuery("#membership").change( NacreData.addup );
    jQuery("#male_cabin").change( NacreData.addup );
    jQuery("#female_cabin").change( NacreData.addup );
    jQuery("#family_cabin").change( NacreData.addup );
    jQuery("#coed_cabin").change( NacreData.addup );
    jQuery("#camping").change( NacreData.addup );
    jQuery("#full_meals").change( NacreData.addup );
    jQuery("#full_meals_child").change( NacreData.addup );
    jQuery("#friday_dinner").change( NacreData.addup );
    jQuery("#friday_dinner_child").change( NacreData.addup );
    jQuery("#saturday_breakfast").change( NacreData.addup );
    jQuery("#sat_breakfast_child").change( NacreData.addup );
    jQuery("#saturday_lunch").change( NacreData.addup );
    jQuery("#sat_lunch_child").change( NacreData.addup );
    jQuery("#saturday_dinner").change( NacreData.addup );
    jQuery("#sat_dinner_child").change( NacreData.addup );
    jQuery("#sunday_breakfast").change( NacreData.addup );
    jQuery("#sun_breakfast_child").change( NacreData.addup );
    jQuery("#sunday_lunch").change( NacreData.addup );
    jQuery("#sun_lunch_child").change( NacreData.addup );
    jQuery("#sunday_dinner").change( NacreData.addup );
    jQuery("#sun_dinner_child").change( NacreData.addup );
    jQuery("#monday_breakfast").change( NacreData.addup );
    jQuery("#mon_breakfast_child").change( NacreData.addup );
    jQuery("#monday_lunch").change( NacreData.addup );
    jQuery("#mon_lunch_child").change( NacreData.addup );
    jQuery("#work").change( NacreData.addup );
    jQuery("#coop").change( NacreData.addup );
    jQuery("#reg_form").submit( NacreData.addup );
    
    var today = new Date();
    var deadline = new Date(2011, 5, 18);
    NacreData.is_preregister = false; /* today <= deadline; */
  }
);