//滚动条左边点击
function goLeft(){
	var t=(document.getElementById('cs2').style.marginLeft=='')?0:parseInt(document.getElementById('cs2').style.marginLeft);
	if (t>-500){
	var t2=t-63;
	document.getElementById('cs2').style.marginLeft=t2+'px';
	document.getElementById('cs1').style.marginLeft=t2+'px';
	}
}
//滚动条右边点击
function goRight(){
	var t=(document.getElementById('cs2').style.marginLeft=='')?0:parseInt(document.getElementById('cs2').style.marginLeft);
	if (t<0){
		t=t+63;
		document.getElementById('cs2').style.marginLeft=t+'px';
		document.getElementById('cs1').style.marginLeft=t+'px';
		//alert(t);
	}
}
//换iframe地址点击
function changeIframe(i){
document.getElementById('yueyu').src="/yueyu1/yueyu"+i+".html";
var myM1=document.getElementById("cs1"); 
var myClass=myM1.getElementsByTagName("a"); 
var j=myClass.length; 
for (var k=0;k<j;k++){ 
myClass[k].className=""; 
} 
myM1.getElementsByTagName("a")[i-1].className="on";
}