function setMaxLen(o){
l=o.getAttribute? parseInt(o.getAttribute("maxlength")) : ""
if (o.getAttribute && o.value.length>l)
o.value=o.value.substring(0,l)
}
  function randomString() {
	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
	var string_length = 16;
	var randomstring = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		randomstring += chars.substring(rnum,rnum+1);
	}
	return randomstring;
}
function reloadPic(o,url){
 var element = document.getElementById(o);
 ss=randomString();
 nurl=url+"?nonse="+ss;
 element.src=nurl;
}