function SetCookie (name, value) { 
       var exp = new Date(); 
       exp.setTime (exp.getTime()+86400*365); 
       document.cookie = name + "=" + value + "; expires=" + exp.toGMTString()+"; path=/"; 
}

function getCookieVal (offset) { 
	var endstr = document.cookie.indexOf (";", offset); 
	if (endstr == -1) endstr = document.cookie.length; 
    return unescape(document.cookie.substring(offset, endstr)); 
 } 
function DelCookie(name)
{
    SetCookie(name, '');
    return;
}

function GetCookie(name) {
         var arg = name + "="; 
         var alen = arg.length; 
         var clen = document.cookie.length; 
         var i = 0; 
         while (i < clen) { 
             var j = i + alen; 
             if (document.cookie.substring(i, j) == arg) return getCookieVal (j); 
             i = document.cookie.indexOf(" ", i) + 1; 
             if (i == 0) break; 
         } 
	     return null; 
 } 
 function Resize(obj,width,height)
{
	var wr = obj.width/width;
	var hr = obj.height/height;
	if (wr>1&&wr>=hr) obj.width = width;
	if (hr>1&&hr>wr) obj.height = height;
}