if (navigator.userAgent.match(/iPhone/i) || navigator.userAgent.match(/iPad/i)) {
var viewportmeta = document.querySelectorAll('meta[name="viewport"]')[0];
if (viewportmeta) {
viewportmeta.content = 'width=device-width, minimum-scale=1.0, maximum-scale=1.0';
document.body.addEventListener('gesturestart', function() {
viewportmeta.content = 'width=device-width, minimum-scale=0.25, maximum-scale=1.6';
}, false);
}
}

/* show/hide label on field */
function make_blank(idElement,strValue)
{
	 if(document.getElementById(idElement).value == "")
	 {
		 document.getElementById(idElement).value = strValue; 
	 }
	 else if (document.getElementById(idElement).value == strValue)
	 {
		  document.getElementById(idElement).value =""; 
	 }
}