function isEmpty(fieldValue)
	{
		if (fieldValue=="" || fieldValue=="0")
		{
			return "field required";
		} else {
			return "";
		}
	}
 function getEmailError (fieldValue) {

		if (fieldValue.indexOf("@")==-1 
  		   || fieldValue.indexOf(".")==-1 
		   || fieldValue.indexOf(" ")!=-1 
		   || fieldValue.length<6){
        		return "Invalid email address";
        }else{
                return "";
        }
 }

 function getPhoneError (fieldValue) {
 	var checkOK = "0123456789-(), ";
	var checkStr = fieldValue;
	var allValid = true;
	for (i = 0;  i < checkStr.length;  i++)
		{
		ch = checkStr.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
		if (ch == checkOK.charAt(j)) break;
		if (j == checkOK.length)
			{
			allValid = false;
			break;
			}
		}
		if (!allValid)
		  return "phone number can contain numbers, '- ( )' symbols, and commas only";
		else
		  return "";
 }

function compareFields(f1, f2, f1caption, f2caption)
{
	if (f1!=f2)
	{
		return f2caption+" must be equal "+f1caption;
	} else {
		return "";
	}
}