//m选项卡数目
//n当前选项卡编号
//鼠标经过显示
function setTab(m,n){
 var menu=document.getElementById("tab"+m).getElementsByTagName("li");   //获取ID为tab+m标签下的li标签
 var showdiv=document.getElementById("tablist"+m).getElementsByTagName("div");   //获取ID为tablist+m标签下的div标签
 for(i=0;i<menu.length;i++)
 {  
	menu[i].className=i==n?"now":"";   //如果i=n;那么menu[i].classname为now
	showdiv[i].style.display=i==n?"block":"none";   		//如果如果i=n;那么showdiv[i].style.display为block"   

 }
}

//m选项卡数目
//n当前选项卡编号
//鼠标离开显示第一个
function setTab2(m,n){
 var menu=document.getElementById("tab"+m).getElementsByTagName("li");   //获取ID为tab+m标签下的li标签
 var showdiv=document.getElementById("tablist"+m).getElementsByTagName("div");   //获取ID为tablist+m标签下的div标签
 for(i=0;i<menu.length;i++)
 {  
	menu[i].className=i==n?"now":"";   //如果i=n;那么menu[i].classname为now
	showdiv[i].style.display=i==n?"block":"none";   		//如果如果i=n;那么showdiv[i].style.display为block"   

 }
}


stuHover = function() {
	var cssRule;
	var newSelector;
	for (var i = 0; i < document.styleSheets.length; i++)
		for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
			{
			cssRule = document.styleSheets[i].rules[x];
			if (cssRule.selectorText.indexOf("LI:hover") != -1)
			{
				 newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
			}
		}
	if (document.getElementById("tabnav1"))
	{
		var getElm = document.getElementById("tabnav1").getElementsByTagName("LI");
		for (var i=0; i<getElm.length; i++) {
			getElm[i].onmouseover=function() {
				this.className+=" iehover";
			}
			getElm[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" iehover\\b"), "");
			}
		}
	}
	
}
if (window.attachEvent) window.attachEvent("onload", stuHover);