function addLoadEvent(func){
	var oldonload=window.onload;
	if(typeof window.onload!='function'){
		window.onload=func;
	}else{
		window.onload=function(){
			oldonload();
			func();
		}
	}
}

function menuHover(elementId,tagName){
	var element=document.getElementById(elementId);
	if(!element)return false;
	var items=element.getElementsByTagName('li');
	var subItem;
	for(var i=0;i<items.length;i++){
		items[i].onmouseover=function(){
			this.className='hover';
			subItem=this.getElementsByTagName(tagName)[0];
			if (!subItem) return false;
			subItem.className='hover';
		}
		items[i].onmouseout=function(){
			this.className='';
			subItem=this.getElementsByTagName(tagName)[0];
			if (!subItem) return false;
			subItem.className='';
		}
	}
}

function selectGoUrl(elementId){
	var element=document.getElementById(elementId);
	if (!element) return false;
	element.onchange=function(){
		if (this.value=='') return false;
		var external = window.open(this.value);
		return external.closed;
	}
}

document.onclick = function(e)
{
  var target = e ? e.target : window.event.srcElement;
  while (target && !/^(a|body)$/i.test(target.nodeName))
  {
    target = target.parentNode;
  }
  if (target && target.getAttribute('rel'))
  {
  	if (target.rel == 'external'){
	    var external = window.open(target.href);
	    return external.closed;
    } else if (target.rel == 'setAsHomepage'){
    	setAsHomepage(target,target.href);
    	return false;
    } else if (target.rel == 'addToBookmark'){
    	addToBookmark(target.title,target.href,"");
    	return false;
    }
  }
}

//<a href="" class="SetAsHomepage" rel="setAsHomepage">设为首页</a>
function setAsHomepage(element,Url)
{
	try
	{
		element.style.behavior='url(#default#homepage)';element.setHomePage(Url);
	}
	catch(e){
		if(window.netscape)
		{
			try
			{
				netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
			}  
			catch (e) 
			{ 
				//alert("抱歉！您的浏览器不支持直接设为首页。请在浏览器地址栏输入“about:config”并回车然后将[signed.applets.codebase_principal_support]设置为“true”，点击“加入收藏”后忽略安全提示，即可设置成功。");
				return false;  
			}
			var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
			prefs.setCharPref('browser.startup.homepage',Url);
		}
	}
}

//<a href="" title="" class="AddToBookmark" rel="addToBookmark">加入书签</a>
function addToBookmark(WebsiteName,Url,Description)   
{
	if (window.sidebar) {  
		window.sidebar.addPanel(WebsiteName,Url,Description); //Mozilla browser  
	} else if( document.all ) { //IE browser  
		window.external.AddFavorite(Url, WebsiteName);   
	} else if( window.opera && window.print ) { //Not Support Now  
		return true;  
	}  
}

function switchTag(whichId){
	var whichId=document.getElementById(whichId);
	if (!whichId) return false;
	var oDiv=whichId.getElementsByTagName('div');
	for (var i=0;i<oDiv.length;i++){
		if (oDiv[i].className=='title'){
			var oTag=oDiv[i].getElementsByTagName('h3');
		}else if (oDiv[i].className=='content'){
			var oBox=oDiv[i].getElementsByTagName('div');
		}
	}
	for (var i=0;i<oTag.length;i++){
		switchBox(oTag,oBox,i);
	}
}
function switchBox(tag,box,whichTag){
	tag[whichTag].onmouseover=function(){
		for (var i=0;i<tag.length;i++){
			if (i==whichTag){
				tag[i].className='selected';
				box[i].className='selected';
			}else{
				tag[i].className='';
				box[i].className='';
			}
		}
	}
	tag[whichTag].onclick=function(){
		return false;
	}
}

//点击显示刷新验证码
function ClickSecurityCode(){
	var SecurityCode=document.getElementById('SecurityCode');
	if (!SecurityCode) return false;
	SecurityCode.onfocus=function(){
		var SecurityCodeImg=document.getElementById('SecurityCodeImg');
		if (!SecurityCodeImg)
		{
			var SecurityCodeImg=document.createElement('img');
			SecurityCodeImg.setAttribute('alt','点击刷新验证码');
			SecurityCodeImg.setAttribute('src','public/securitycode.asp?t='+Math.random());
			SecurityCodeImg.setAttribute('id','SecurityCodeImg');
			SecurityCodeImg.style.cursor="pointer"
			this.parentNode.appendChild(SecurityCodeImg);
		}
		SecurityCodeImg.onclick = function(){
			this.setAttribute('src',this.src.split('?')[0]+'?t='+Math.random());
		}
	}
}

//addLoadEvent(function(){menuHover('nav','ul')});
addLoadEvent(function(){switchTag('LinkExchange')});
//addLoadEvent(ClickSecurityCode);