var startsWith = function(me,str){return (me.match("^"+str)==str)}


var totalitup = function(){
  var total = 0
  $('.money:checked').each(function(){
    classes = $(this).attr('class').split(' ')
    $.each(classes,function(i,v){
      if(startsWith(v,'add_')){
        number = parseFloat(v.split('add_')[1])
        total += number
      }
    })
  })
  
  $('#total').html("$"+total)
  $('input#totalamount').val("$"+total)
  var url = $('#redirect').attr('value').split('?')[0]
  url += "?"+total
  $('#redirect').attr('value',url)
}

$('.money').change(totalitup)
totalitup()