function check_form(obj) {
    var result = true;
    var fields = "";
    var is_email_invalid = false;
    jQuery('input',obj).each(
        function () {
            if (this.type != 'hidden') {
                if (this.value == '') {
                    fields = fields + jQuery(this).attr('rel')+"\n";                    
                    result = false;
                } else {
                   if (this.name == 'email' && !echeck(this.value)) {
                       is_email_invalid = true;
                   }
                }
            }
            
        }
    );

    if (!result || is_email_invalid) {
        str = ""; 
        if (!result) {
           str = str + "Please enter the following missing information(s):\n"+fields;   
        }   
        if (is_email_invalid) {
            str = str + "Invalid Email ID. Please Enter a valid Email ID.";
        }   
   
        alert(str);    
        result = false;
    }

    return result;
}

function echeck(str) {

      var at="@"
      var dot="."
      var lat=str.indexOf(at)
      var lstr=str.length
      var ldot=str.indexOf(dot)
      if (str.indexOf(at)==-1){
         return false
      }

      if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
         return false
      }

      if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
          return false
      }

       if (str.indexOf(at,(lat+1))!=-1){
          return false
       }

       if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
          return false
       }

       if (str.indexOf(dot,(lat+2))==-1){
          return false
       }
      
       if (str.indexOf(" ")!=-1){
          return false
       }

       return true               

}

function recalculate(amount) {
   total = parseFloat(jQuery('.amount').html());
   if (jQuery('input[@name=recovery_protection]')[0].checked) {
      total = total+9.95;
   } else {
      total = total-9.95; 
   }
   jQuery('.amount').html(total.toFixed(2));
}