//em('sklink').href="css"+ys+".css"//调用 css,改变颜色 
//---公开课培训网---韦书胜----,动态改变css，改变页面风格
cook=Gcookie('skin');
if(cook) 
em('sklink').href="/oBlogStyle/base"+cook+".css";
else
em('sklink').href="/oBlogStyle/base3.css";
function em(e) { return document.getElementById(e); }
function ssk(a) {
	ys=a;
	em('sklink').href="/oBlogStyle/base"+ys+".css";
	Scookie('skin',a,365);
}
function Scookie(name,value,days)
{
if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function Gcookie(name)
{
var arg = name + "=";
var alen = arg.length;
var c= document.cookie;
var clen =c.length;
var i = 0                   
while (i < clen){
var j = i + alen
if (c.substring(i, j) == arg)
return GetCookie(j)
i = c.indexOf(" ", i) + 1
if (i == 0) break
}
return null
}
function GetCookie(offset)
{
var c= document.cookie;
var endstr = c.indexOf (";", offset)
if (endstr == -1) endstr = c.length
return unescape(c.substring(offset, endstr))
}