js仿百度貼吧驗證碼特效實例程式碼_javascript技巧

 
     
     
     
     
     
     
     
     
    ; 

    function getid(id) { 
       取得屬性樣式
    function getStyle(id,prop){  
        var obj=getid(id); 
        var ition"){/ /IE6~8不相容backgroundPosition寫法，辨識backgroundPositionX/Y 
            if(ie){      PositionX " " obj.currentStyle.backgroundPositionY; 
            } 
       (obj.currentStyle) { 
            return obj.currentStyle[prop];                   proppropprop = prop.replace (/([A-Z])/g, "-$1");            
            proppropprop = prop.toLower  ument.defaultView.getCompulatedStyle (obj,null)[prop];      
       anslist = ["","","",""];// 儲存容器 
    var crent="-56px -92px,-100px - 138像素，-100像素-92像素，-3像素-138像素」； //正確答案容器 
    var flag=0;//從第0 個開始算相當於當到第3 個時自動對比答案 
    var adbs=getid("val_add").getElementsByTagName( "b" ）； 
    function addans(va){ 
        for(var i=0;i            {        
               adbs[i].style.cssText="背景位置：" anslist[i]; 
               >            } 
        } 
            if(anslist==crent) 
            { 
          "); 
            } 
             }        Alert("答案錯誤！"); 
                刪除(); 🎜>    } 

    //清除原有值 
    function dele(){ 
        flag=0; 
         adbs[i].style .cssText=""; 
        anslist = ["","","",""]; 
    }

    //綁定九宮格驗證碼的點擊事件 
    function addEvt(tab,ct,type){ 
     //var cdiv = getid(ct).getElementsByTagName(type); 
        for(var i = 0;i                //與 id,"backgroundPosition"); 
                var ststd=st.split(" ");//屬性中間的空間作為分隔符號如：background-position:215px 215px; getStyle方法取得價值為215px 215px; 
                           /*-53px -36px,-56px -41px;經對照九宮格與顯示選擇的答案x差-3，y差-5*/ 
                st1= parseInt(std[0].replace("p  seInt(std[1]. replace("px"))-5;           
               🎜>
        } 
    } 
    addEvt("val_input");