function initMain(){
	var _nav = document.getElementById("nav");
	var _nodes = _nav.getElementsByTagName("span");
	if(_nav && _nodes) {
		for (var i = 0; i < _nodes.length; i++){
			_nodes[i].style.width = 190 - _nodes[i].parentNode.getElementsByTagName("a")[0].offsetWidth + "px";
		}
	}
}

if (window.addEventListener) window.addEventListener("load", initMain, false);
else if (window.attachEvent) window.attachEvent("onload", initMain);