// JavaScript Document
function doSubmit(image)
{
var form = document.searchform;

if(form.keywords.value=="" || form.keywords.value.substring(0,3) =="请输入"){
//form.target="_self"
//location.href="/index.html";
//form.action="/index.html"
//form.submit();
}else 
{if(image)form.action="/search.asp";
//else form.action="/zhida.asp";
else
{form.target="_self"  　//屏蔽直达功能
location.href="/index.html";　//屏蔽直达功能
}
form.submit();
}
}
    function secBoard(n)
  {
for(i=1;i<4;i++)
{document.getElementById("menu" + [i]).className="menu2";
document.getElementById("menu" + [n]).className="menu1";
document.getElementById("table1" + [i]).style.display="none";
document.getElementById("table1" + [n]).style.display="";
 }
  }
    function topsearch(n)
  {
for(i=1;i<4;i++)
{document.getElementById("searchtd" + [i]).className="search1";
document.getElementById("searchtd" + [n]).className="search2";
var kwords="";
var v = document.searchform.keywords.value;
if (v.substring(0,3) =="请输入" || v=="")
{if (n==1)
kwords="请输入项目关键字";
if (n==2)
kwords="请输入资讯关键字";
if (n==3)
kwords="请输入展会关键字";
}
else
kwords=v;
document.searchform.keywords.value=kwords;
document.searchform.infosort.value=n;
 }
  }
function preloadedImages() 
{ 
heavyImage1 = new Image(); 
heavyImage1.src = "/images/topsearch4.gif"; 
}