window.onload = function() {
	navcheck();
}



//当前位置
function navcheck() {
	var browsurl = window.location.href;
	var ele = document.getElementById("mainnav").getElementsByTagName("a")
	for (var i = 0; i < ele.length ; i++ )
	{
			var eleli = ele[i].getAttribute("href")

			if (browsurl.indexOf(eleli) != -1)
			{
			ele[i].parentNode.className= "now";
			}
           
		}

var newele = document.getElementById("mainnav").getElementsByTagName("li");
for (var k = 0 ; k < newele.length ; k++ )
{
	newele[k].onmouseover = function() {
		for (var n = 0 ; n < newele.length ; n++ )
		{
			newele[n].className = "";
		}
		this.className = "now";
	}


}


	}