var fields = "";
var sub = false;
function trackFormFields(formName) {
	var myform = document.getElementById(formName);	
	 for (var i = 0; i < myform.length; i++) {
	 	// check to see what kind of field this is
	
	 	//textbox
	 	if (myform.elements[i].type == "text") {
	 		if ( myform.elements[i].value != '' ) {
	 			if (fields.indexOf(myform.elements[i].name) == -1) {	 				
       				 fields = fields + myform.elements[i].name + "," ;	 		
	 			}
	 		}
	 	}
	 	//drop down
	 	if (myform.elements[i].type == "select-one") {
	 		if (myform.elements[i].selectedIndex != 0) {
	 			if (fields.indexOf(myform.elements[i].name) == -1) {
       				 fields = fields + myform.elements[i].name + ",";	 		
	 			}
	 		}
	 	}
	 	//check box
	 	if (myform.elements[i].type == "checkbox") {	 	 			 		
	 		if (myform.elements[i].checked == true) {	 				
	 			if (fields.indexOf(myform.elements[i].name) == -1) {
       				 fields = fields + myform.elements[i].name + ",";	 		
	 			}
	 		}
	 	}
	 }		 
	return fields;
}