function tab(tabName,liId,tabNumber,styleName)
{
	for(i=0;i<tabNumber;i++)
	{	
		if(document.getElementById(tabName+"_div"+i))
		{
			document.getElementById(tabName+"_div"+i).style.display = "none";
		}
	};
	document.getElementById("menu_li0").className = "li0_a";
	document.getElementById("menu_li1").className = "li1_a";
	document.getElementById("menu_li2").className = "li2_a";
	document.getElementById("menu_li3").className = "li3_a";
	document.getElementById("menu_li4").className = "li4_a";
	document.getElementById("menu_li5").className = "li5_a";
	document.getElementById("menu_li6").className = "li6_a";
	if(document.getElementById(tabName+"_div"+liId))
		{
			document.getElementById(tabName+"_div"+liId).style.display = "";
		}
		document.getElementById(tabName+"_li"+liId).className = styleName+"_b";
};

// 以下为网页标签层切换效果代码
function restore()
{
w2.style.display="none";w3.style.display="none";w4.style.display="none";w5.style.display="none";
a2.className="";a3.className="";a4.className="";a5.className="";
}
// 显示C2
function c2()
{
a2.className="curr";
w2.style.display="block";
}
// 显示C3	
function c3()
{
a3.className="curr";
w3.style.display="block";
}
// 显示C4	
function c4()
{
a4.className="curr";
w4.style.display="block";
}
// 显示C5	
function c5()
{
a5.className="curr";
w5.style.display="block";
}
// 触发事件的脚本。
// 初始化按钮状态
function restore2()
{
w6.style.display="none";w7.style.display="none";w8.style.display="none";
a6.className="";a7.className="";a8.className="";
}
// 显示C6
function c6()
{
a6.className="curr";
w6.style.display="block";
}
// 显示C7	
function c7()
{
a7.className="curr";
w7.style.display="block";
}
// 显示C8	
function c8()
{
a8.className="curr";
w8.style.display="block";
}