var val;

function changetext(fieldName)
{	val=document.getElementById(fieldName).value;
	if(val=="City Name")
	{document.getElementById(fieldName).value="";}
	if(val=="State Name")
	{document.getElementById(fieldName).value="";}
	if(val=="ZIP Code")
	{document.getElementById(fieldName).value="";}
}
function replacetext(fieldName)
{	if(document.getElementById(fieldName).value=="")
    {if(val=="City Name")
	 {document.getElementById(fieldName).value=val;}
	if(val=="State Name")
	{document.getElementById(fieldName).value=val;}
	if(val=="ZIP Code")
	{document.getElementById(fieldName).value=val;}
		};
}