window.onload = function () {	
	if (document.getElementById) {		
		var inputElements = document.getElementsByTagName("input");		
		for (var i = 0; i < inputElements.length; i++) {			
			if (inputElements[i].type == "text" && 
			    inputElements[i].value != "" &&
			    isNaN(inputElements[i].value)) {
				inputElements[i].onfocus = function () {
					this.value = "";	
				}				
			}
		}	
	}	
}