//top搜索js
function over(){
if(document.getElementById("searchTxt").value=="搜索"){
		document.getElementById("searchTxt").value="";
		document.getElementById("searchTxt").style.color='black';
	}
}
function out(){
if(document.getElementById("searchTxt").value==""){
	document.getElementById("searchTxt").style.color='#999999';
		document.getElementById("searchTxt").value="搜索";
	}	
}

//导航栏下拉
function expandIt(el) {
 obj = eval("sub" + el);
 if (obj.style.display == "none") {
obj.style.display = "block";//显示子菜单
	}
	else if(obj.style.display == "block"){
	obj.style.display ="none";
	}
}