function check_input(field_name, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;

    if (field_value == '') {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}
function checkinteger(object_name,message) {
	if (form.elements[object_name] && (form.elements[object_name].type != "hidden")) {
   			 var object_value = form.elements[object_name].value;
	
			
	if(!isInteger(object_value))
		{	//return false;    
			error_message = error_message + "* " + message + "\n";
			error = true;
		}
		}
		
	
}
function isInteger (s)
   {
      var i;

      if (isEmpty(s))
      if (isInteger.arguments.length == 1) return 0;
      else return (isInteger.arguments[1] == true);

      for (i = 0; i < s.length; i++)
      {
         var c = s.charAt(i);

         if (!isDigit(c)) return false;
      }

      return true;
   }
function isEmpty(s)
   {
      return ((s == null) || (s.length == 0))
   }

   function isDigit (c)
   {
      return ((c >= "0") && (c <= "9"))
   }

function check_email(object_name,message) {
	var object_value=form.elements[object_name].value;
	
	if ((object_value.length == 0)||!(object_value.indexOf("@") > -1 && object_value.indexOf(".") > -1))
	{	//return false;    
		error_message = error_message + "* " + message + "\n";
      	error = true;
	}
	//return true;
}
//-->





function check_radio(field_name, message) {
  var isChecked = false;

  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var radio = form.elements[field_name];

    for (var i=0; i<radio.length; i++) {
      if (radio[i].checked == true) {
        isChecked = true;
        break;
      }
    }

    if (isChecked == false) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_select(field_name, field_default, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;

    if (field_value == field_default) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}
function checkcode(field_name1,field_name2)
{
   var field_value1 = form.elements[field_name1].value;
   var field_value2 = form.elements[field_name2].value;
   if (field_value1=='')
       {
		error_message = error_message + "* Please enter the security code!\n";
		error=true;
		return false;
       }
	if(field_value1 != field_value2)
	{
			error_message = error_message + "* The security code is incorrect.\n";
			error=true;
			return false;
	}
}