navHover = function() {
	var lis = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<lis.length; i++) {
		lis[i].onmouseover=function() {
			this.className+=" iehover";
		}
		lis[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" iehover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", navHover);

function getbyid(id) {
	if (document.getElementById) {
		return document.getElementById(id);
	} else if (document.all) {
		return document.all[id];
	} else if (document.layers) {
		return document.layers[id];
	} else {
		return null;
	}
}

function addImgLink(divID) {
	var msgarea = getbyid(divID);
	if(msgarea) {
		var imgs = msgarea.getElementsByTagName('img');
		for (i=0; i<imgs.length; i++) {
			if (imgs[i].parentNode.tagName.toLowerCase() != 'a') {
				imgs[i].title = '点击图片可在新窗口打开';
				imgs[i].style.cursor = 'pointer';
				imgs[i].onclick = function() { window.open(this.src); }
			}else{
				imgs[i].parentNode.target = '_blank';
			}
		}
	}
}