var navid=10;
var tags = document.getElementById("headnav").getElementsByTagName("li");		  

function chooseNav(obj){
	var navItem = document.getElementById("headnav");
	var navLiArr = obj.parentNode.getElementsByTagName("li");
	var childItem = document.getElementById("childnav");
	var childLiArr = childItem.getElementsByTagName("div");
	var navLiCount = navLiArr.length;
	for(i=0;i<navLiCount;i++){
		if(navLiArr[i] == obj){
			navLiArr[i].className = "cur";
			childLiArr[i].style.display = "block";
			postX=i*81+4;
			navItem.style.backgroundPosition = postX +"px 6px";
			navid=i;
			document.getElementById("searchid").value=i;
		}else{
			navLiArr[i].className = "";
			childLiArr[i].style.display = "none";
		}
	}
} 

function defaultNav(){
	var curid = 0;
	var url = document.location.href;
	var urlArr = url.split("/");
	var curStr = urlArr[3];
	switch(curStr){ 
			case 'outsourcing-news':
				curid=1;break;
			case 'binhai-outsourcing':
				curid=2;break;
			case 'outsourcing-parks':
				curid=3;break;
			case 'policy':
				curid=4;break;
			case 'research-insights':
				curid=5;break;
			case 'bssoca':
				curid=6;break;
			case 'bssop':
				curid=7;break;
			case 'provider':
				curid=8;break;
			default:
				curid=0;
		}		
	chooseNav(tags[curid])
}
function backNav(id){
		if(id==navid &&  document.getElementById("childnav").getElementsByTagName("div")[navid].innerHTML==""){
			defaultNav();
		}
		else return;
}

function curNav(id){
	chooseNav(tags[id]);
}
defaultNav();