function $(element)
{
  return document.getElementById(element);
}
String.prototype.trim = function(){
	return this.replace(/(^\s*)|(\s*$)/g,"");
}
String.prototype.replaceAll= function(s1,s2){
return this.replace(new RegExp(s1,"gm"),s2);   
}

/*获取绝对位置*/
function calculateOffsetTop(field)
{
    return calculateOffset(field,"offsetTop");
}
function calculateOffsetLeft(field)
{
    return calculateOffset(field,"offsetLeft");
}
function calculateOffset(field, attr)
{
    var offset = 0;
    while(field){
    offset += field[attr]; 
    field = field.offsetParent;
    }
    return offset;
}

/*获取参数*/
function getUrlParam()
{
	var Url=top.window.location.href;
	var u,g,StrBack='';
	if(arguments[arguments.length-1]=="#")
	u=Url.split("#");
	else
	u=Url.split("?");
	if (u.length==1) g='';
	else g=u[1];
	if(g!='')
	{
		gg=g.split("&");
		var MaxI=gg.length;
		str = arguments[0]+"=";
		for(i=0;i<MaxI;i++)
		{
			if(gg[i].indexOf(str)==0) 
			{
			StrBack=gg[i].replace(str,"");
			break;
			}
		}
	}
	return StrBack;
}
//去掉字符串 的头空格
function LTrim(str)
{ 
var i; 
for(i=str.length-1;i>=0;i--){ 
if(str.charAt(i)!="%20"&&str.charAt(i)!="%20") break; } 
str = str.substring(0,i+1); 
return str; 

}

/*page public functions*/
//查询
function searchKey(title)
{
	var url="VideoList.aspx?Rvalue=3&type=0&title="+escape(title);
	window.open(url,"search");
	//window.location=url;
}
function tipUseVideo()
{
	var obj=document.getElementById("txtVideo");
	if(obj.value == "请输入关键字")
	{
		obj.value="";
	}
}
function tipLoseVideo()
{
	var obj=document.getElementById("txtVideo");
	if(obj.value.trim() == "")
	{
		obj.value="请输入关键字";
		return;
	}
}
//回车
   function huiche(){
   if(window.event.keyCode   ==   13)   
   {   
      searchVideo(); 
   }   
   else
   {
    return false;
   }
}
// 添加到收藏夹
function addBookmark(){
	var title=document.title
	var url=document.location.href
	if (window.sidebar) window.sidebar.addPanel(title, url,"");
	else if( window.opera && window.print ){
	var mbm = document.createElement('a');
	mbm.setAttribute('rel','sidebar');
	mbm.setAttribute('href',url);
	mbm.setAttribute('title',title);
	mbm.click();}
	else if( document.all ) window.external.AddFavorite( url, title);
}
//设为首页 
function setHomepage(){
 if (document.all){
    document.body.style.behavior='url(#default#homepage)';
	document.body.setHomePage('http://www.5show.com/');
 }
 else if (window.sidebar){
    if(window.netscape){
		try{ 
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); 
         }catch (e){ 
			alert( "该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true" ); 
			return false;
         }
    }
    var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);
    prefs.setCharPref('browser.startup.homepage','http://www.5show.com/');
 }
}


//登录
function loginLand()//(funcallback)
{
	if(confirm("请先登陆!"))
	{
		window.location.href="http://www.5show.com/LoginUser.aspx";
	}	
}
//关闭
function loginClose(uid,uname,pic)
{
    document.getElementById('landresult').innerHTML="hi, <a id=\"uland\" href=\"/my_space.aspx\">"+uname+"</a> <a href=\"/LoginOut.aspx\">[登出]</a>";
    var dlogin= document.getElementById('defaultlogin');
    if(dlogin)
    {
       dlogin.innerHTML= "<div class='fleft'><img src='"+pic+"' width='50' height='50' class='out_bq' /></div><div class='fleft login_name'>您好，<br /><a href='my_space.aspx'>"+uname+"</a>  <a href='LoginOut.aspx'>退出</a></div>";
    }
    new dialog().close();
}
 //登录回车
function LandClick(e) 
{
    var e = e || window.event;
    var currKey = e.keyCode || e.which || e.charCode;
    if (currKey==13) {loginDiv();return;}
}
function loginDiv()
{
    var struid,passwd;
    struid = document.getElementById("iptUid").value.replace(/^\s*/i,'');
    passwd = document.getElementById("iptPasswd").value.replace(/^\s*/i,'');
    if (!(/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i.test(struid))){alert("邮箱格式错误！");return false;}
    if(passwd == ""){alert("密码不能为空！");return false;}
    document.logform.userName.value = struid;
    document.logform.userPwd.value = passwd;
    document.logform.submit();
}

 //登录回车
function CheckLoginKeyboard(e) 
{
    var e = e || window.event;
    var currKey = e.keyCode || e.which || e.charCode;
    if (currKey==13) {loginDiv();return;}
}
function CheckLogin()
{
    var struid,passwd;
    struid = document.getElementById("iptUid").value.replace(/^\s*/i,'');
    passwd = document.getElementById("iptPasswd").value.replace(/^\s*/i,'');
    if (!(/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i.test(struid))){alert("邮箱格式错误！");return false;}
    if(passwd == ""){alert("密码不能为空！");return false;}
    
    return true;
}