网络生活——关注网络，关注前端设计

var Swidth = screen.width;
var Surl = "http://www.yours.com/";
var Skin = ["cssstyle1.css", "cssstyle2.css"];
var Skintemp;
if (Swidth >= 1280) {
    Surl += "skin_1200";
} else {
    Surl += "skin";
}
for (var i = 0; i < Skin.length; i++) {
    Skintemp = document.createElement("link");
    Skintemp.type = "text/css";
    Skintemp.rel = "stylesheet";
    Skintemp.href = Surl + "/" + Skin[i];
    document.getElementsByTagName("head")[0].appendChild(Skintemp);
}

//焦点图
var n=0;
var num=1;
var c=new Array(0,5,10);
function Mea(value){
	n=value;
	if (value<5) {
		num=1;
	} else if ( value>4&value<10 ) {
		num=2;
	} else if (value>9) {
		num=3;
	}
	v = value-5*(num-1);
	aunum = "au"+num;
	setBg(value);
	plays(v);
	conaus(v);
	}
function setBg(value){
	for(var i=0;i<5;i++) {
	ii=5*(num-1)+i;
	document.getElementById("t"+ii+"").className="bbg0";
	}
	document.getElementById("t"+value+"").className="bbg1";
	}
function plays(v){
	try
	{
		document.getElementById("au"+num).filters[0].Apply();
		var d = document.getElementById("au"+num).getElementsByTagName("div");
		for(i=0;i<5;i++)i==v?d[i].style.display="block":d[i].style.display="none";
		document.getElementById("au"+num).filters[0].play();
	}
	catch(e)
	{
		var d = document.getElementById("au"+num).getElementsByTagName("div");
		for(i=0;i<5;i++)i==v?d[i].style.display="block":d[i].style.display="none";
	}
}
function conaus(v){
	try
	{
		with ("conau"+num){
 
				for(i=0;i<5;i++)i==v?children[i].style.display="block":children[i].style.display="none";
 
				}
	}
	catch(e)
	{
		var d = document.getElementById("conau"+num).getElementsByTagName("div");
		for(i=0;i<5;i++)i==v?d[i].style.display="block":d[i].style.display="none";
	}
 
}
//tab激活该tab的自动播放
function autorun(m){
    for(i=0;i<3;i++){
		if(i==num-1){
			c[i]=n;
		}
	}
	clearAuto();
	if(m==num){
		setAuto();
	} else{
		num=m;
		n=c[m-1];
		setAuto();
	}
}
 
function clearAuto(){clearInterval(autoStart)}
function setAuto(){autoStart=setInterval("auto(n)", 3000)}
function auto(){
	n++;
	if(n>5*(num-1)+4)n=5*(num-1);
	Mea(n);
	conaus(n-5*(num-1));
}
setAuto();