function ismaxlength(obj){
	checkTrim(obj);
	displayLength(obj);
}
function checkTrim(obj) {
	var mlength=obj.attributes["MaxLength"].value;
	if (obj.getAttribute && obj.value.length>mlength)
		obj.value=obj.value.substring(0,mlength)
		
}
function displayLength(obj) {
var mlength=obj.attributes["MaxLength"].value;
document.getElementById("dv_characters").innerHTML = obj.value.length + '/' + mlength;
}