var old_menu = ""
function showMenu(No)
{
	var menuTd = document.getElementById("menuTd")
	if(No == "one"){
		menuTd.innerHTML="<table width='100%' border='0' cellspacing='0' cellpadding='0' class='menu'><tr><td width=5></td><td width='80'><a href='/column_inc/lpmaga.asp' class='menu'>技术论坛</a></td></tr></table>"
	}
	
	if(No == "two"){
		menuTd.innerHTML="<table width='100%' border='0' cellspacing='0' cellpadding='0'><tr><td width='100'></td><td width='66'><div align='center'><a href='/column_inc/lpexhi.asp' class='menu'>展会信息</a></div></td><td width='1' bgcolor='#FFFFFF'></td><td width='10'></td><td width='55'><a href='/column_inc/lpnews.asp' class='menu'>行业新闻</a></td><td width='1' bgcolor='#FFFFFF'></td><td width='10'></td><td><a href='/column_inc/lplaw.asp' class='menu'>政策法规</a></td></tr></table>"
	}

	if(No == "three"){
		menuTd.innerHTML=""
	}

	if(No == "four"){
		menuTd.innerHTML="<table width='100%' border='0' cellspacing='0' cellpadding='0' align='right'><tr><td width='240'></td><td width='60'><div align='center'><a href='/enterprise/lpview.asp' class='menu'>信息查看</a></div></td> <td width='1' bgcolor='#FFFFFF'></td><td width='10'></td><td width='57'><a href='/enterprise/lprel1.asp' class='menu'>信息发布</a></td><td width='1' bgcolor='#FFFFFF'></td><td width='10'></td><td width='57'/enterprise/lpadmin.asp' class='menu'><a href='/enterprise/lpadmin.asp' class='menu'>信息管理</a></td><td width='1' bgcolor='#FFFFFF'></td><td width='7'></td><td width='98'><a href='/enterprise/lpsearch.asp' class='menu'>分类检索</a></td></tr></table>"
	}
	
	if(No == "five") 
		menuTd.innerHTML=""
}

var old_img = ""
function showExhi(exhi)
{
	exhi = "exhi" + exhi;
	var exhi_img = document.getElementById(exhi);
	var exhi1 = document.getElementById("exhi1");
	if(old_img=="" && exhi_img != exhi1)
	{	
		exhi_img.style.display = "";	
		exhi1.style.display = "none";
	}
		else if(old_img != "")
		{
			var old_imgObj = document.getElementById(old_img)
			old_imgObj.style.display = "none";
			exhi_img.style.display = "";
		}
	old_img = exhi
}

function makevisible(cur,which){ 
	if(which==0) 
　　　cur.filters.alpha.opacity=100 
	else 
　　　cur.filters.alpha.opacity=40 
}

function CloseAd()
{
var oDiv1 = document.getElementById("Layer1")
var oDiv2 = document.getElementById("Layer2")
oDiv1.style.display = "none"
oDiv2.style.display = "none"
}