function isEmpty(stringValue) {
		return ( stringValue == null || stringValue.length == 0 );
	}

	function getElement(elementName) {
		if (document.getElementById){
			return document.getElementById(elementName);
		}
		if (document.all) {
			return document.all[elementName];
		}
		if (document.layers){	  
			return document.layers[elementName];
		}
	}