主题切换css

html代码，将样式置为空：

js代码

window.οnlοad=initAll;
function initAll()
{
	document.getElementById("zhuti1").οnclick=s1;
	document.getElementById("zhuti2").οnclick=s2;
	document.getElementById("zhuti3").οnclick=s3;
	document.getElementById("nozhuti").οnclick=s0;
}
function s1()
{
	var newCss=document.getElementById("linkid");
    newCss.href="style1.css";
}
function s2()
{
	var newCss=document.getElementById("linkid");
    newCss.href="style2.css";
}
function s3()
{
	var newCss=document.getElementById("linkid");
    newCss.href="style3.css";
}
function s0()
{
	var newCss=document.getElementById("linkid");
    newCss.setAttribute("href","");
}