/**
 * 导航菜单
 */
function menuFix() {
  var sfEls = document.getElementById("headnav").getElementsByTagName("li");
  for(var i=0;i<sfEls.length;i++) {
		var ulss=sfEls[i].getElementsByTagName("ul");	
	}
  for (var i=0; i<sfEls.length; i++) {
    sfEls[i].onmouseover=function() {
      this.className+=(this.className.length>0? " ": "") + "show";
    }
    sfEls[i].onmouseout=function() {
      this.className=this.className.replace(new RegExp("( ?|^)show\\b"), "");
    }
  }
}
window.onload=menuFix;



String.prototype.trim = function() { return this.replace(/(^\s*)|(\s*$)/g,""); }