function validateForm(formname, fields, fieldnames)
{
	var tmpfield;	
	//check for required fields
	if(fields!="")           //if fieldnames not blank
	{
		var arrayFields= fields.split(",");
		var arrayFieldNames=fieldnames.split(",");
		for(i=0;i<(arrayFields.length);i++)
		{
			tmpfield=arrayFields[i];
			if(tmpfield && document.forms[formname][tmpfield].value=="")
			{
				alert("Please fill in " + arrayFieldNames[i]);
				document.forms[formname][tmpfield].focus();
				return false;
			}
		}
	}
	return true;
}