function addfavorite()
{
   if (document.all)
   {
      window.external.addFavorite('http://www.3eit.com.cn','鄂西IT�?中关村在线三峡站');
   }
   else if (window.sidebar)
   {
      window.sidebar.addPanel('鄂西IT�?中关村在线三峡站', 'http://www.3eit.com.cn', "");
   }
} 
function showtab(btnid,tabid,tabnumber)//点击按钮ID，舌签区ID，舌签数�?
{
	for (i = 1;i<=tabnumber;i++)
	{
		document.getElementById(tabid+"_btn"+i).className = "tabpane";
		document.getElementById(tabid+"_sub"+i).style.display = "none";
	}
	document.getElementById(tabid+"_btn"+btnid).className = "select";
	document.getElementById(tabid+"_sub"+btnid).style.display = "";
}

function checkForm(form1){
  if(form1.keyword.value==""){
    alert("关键字不能为�?--3Eit");
    form1.keyword.focus();
	return false;
   }
 }
function checkLoginForm(form1){
  if(form1.username.value==""){
    alert("用户名不能为�?-3Eit");
    form1.username.focus();
	return false;
   }
  if(form1.password.value==""){
    alert("密码不能为空--3Eit");
    form1.password.focus();
	return false;
   }
   document.getElementById('loginbox').style.display='none';
 }