var pageTracker = _gat._getTracker('UA-958988-3');
    
    pageTracker._initData();
    pageTracker._trackPageview();

    function ImageOver( id){

        var element;
        var url;
        
        url = './images/icon_blue_ball.gif';
        
        element = document.getElementById( id);

        element.src = url;

    }
  
    function ImageOut( id){

        var element;
        var url;
        
        url = './images/icon_gray_ball.gif';

        element = document.getElementById( id);

        element.src = url;

    }

    function ButtonOver( id, url){

        var element;
        
        element = document.getElementById( id);

        element.src = url;

    }
  
    function ButtonOut( id, url){

        var element;

        element = document.getElementById( id);

        element.src = url;

    }
    
    function isFacebook(){
        
       u = location.href;
       t = document.title;
       
       window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=650,height=420');
       
       return false;
        
    }
    
    function isPlurk(){
        
        window.open('http://www.plurk.com/?qualifier=shares&status='  .concat(' ') .concat(' ') .concat(encodeURIComponent(location.href)) .concat(' ') .concat('(') .concat(encodeURIComponent(document.title)) .concat(')'));
        
    }
    
    function isTwitter(){
        
        window.open('http://twitter.com/home/?status='.concat(encodeURIComponent(document.title)) .concat(' ') .concat(encodeURIComponent(location.href)));
        
    }

    function isSignIn(){
    
        if( document.signinform.username.value.length == 0){
            
            alert('請輸入帳號！');
            document.signinform.username.focus();
            return false;
            
        }
        
        if( document.signinform.password.value.length == 0){
            
            alert('請輸入密碼');
            document.signinform.password.focus();
            return false;
            
        }                    
        
    }

    function openLogin(){
    
        if( document.getElementById('login').innerHTML == '登入'){
        
            document.getElementById('login').innerHTML = '取消';
            document.getElementById('loginbox').style.display = 'block';
            
        }

        else{
            
            document.getElementById('login').innerHTML = '登入';
            document.getElementById('loginbox').style.display = 'none';
                        
        }
        
    }

    function isComment(){
        
        var element;
        
        element = document.commentform;

        if( Trim( element.membersn.value).length == 0){
            
            alert('須先登入才能進行留言！');
            window.scrollTo( 0, 0);
            return false;

        }
        
        if( Trim( element.nickname.value).length == 0){
            
            alert('請輸入顯示暱稱！');
            element.nickname.focus();
            return false;
            
        }

        if( Trim( element.content.value).length == 0){
            
            alert('請輸入留言內容！');
            element.content.focus();
            return false;
            
        }

        if( ! confirm('您確定要送出篇留言內容！')){
            
            return false;             
            
        }
            
        element.submit();
        
    }

    function isDeleteComment( id){
        
        if( confirm('您確定要刪除您此篇留言內容！')) location.replace('article_comment_delete_act.aspx?id=' + id);
  
    }

    function isVote(){
    
        var i;
        var count;
        
        count = 0;
        
        for( i = 0; i < document.voteform.item.length; i ++){
            
            if( document.voteform.item[i].checked) count ++;
            
        }
        
        if( count == 0){
            
            alert('請選擇一個評分項目！');
            document.voteform.item[0].focus();
            return false;
            
        }
            
        document.voteform.submit();
        
    }

    function isSeek(){
    
        if( Trim( document.seekform.ins.value).length < 2){
            
            alert('請輸入關鍵字進行搜尋！');
            document.seekform.ins.focus();
            return false;
            
        }    
            
        document.seekform.submit();

    }

    function OpenLink( url, width, height){
        
        window.open( url, 'OpenLink', 'scrollbars=auto, width=' + width + ', height=' + height + '');
        
    }
    
    function isPrint( sn){
        
        window.open( './article_print.aspx?sn=' + sn, 'OpenPrint', 'scrollbars=yes, width=500, height=650');
        
    }

    function isShare( sn){
        
        window.open( './article_share.aspx?sn=' + sn, 'OpenShare', 'scrollbars=no, width=500, height=390');
        
    } 
    
    function Trim( ins){ 
    
        var output;
    
        output = /(^\s*)|(\s*$)/g; 
        
        return ins.replace( output, ''); 

    }