发个js图片放大效果啊

参考：
http://topic.csdn.net/u/20080330/11/17b4e878-9be7-469d-9e21-70b65821889d.html

解决方案 »

  1.   

    把style 属性，改到用className 可以，就是闪来闪去的
      

  2.   

    给你个现成的<html>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
    <title>JS网页图片查看器－可控制图片放大缩小还原移动效果</title>
    <META HTTP-EQUIV="imagetoolbar" CONTENT="no">
    <style type="text/css">
    body { font-family: "Verdana", "Arial", "Helvetica", "sans-serif"; font-size: 12px; line-height: 180%; }
    td { font-size: 12px; line-height: 150%; }
    </style>
    <SCRIPT language=JavaScript>
    drag = 0
    move = 0// 拖拽对象
    // 参见：http://blog.sina.com.cn/u/4702ecbe010007pe
    var ie=document.all;
    var nn6=document.getElementById&&!document.all;
    var isdrag=false;
    var y,x;
    var oDragObj;function moveMouse(e) {
    if (isdrag) {
    oDragObj.style.top = (nn6 ? nTY + e.clientY - y : nTY + event.clientY - y)+"px";
    oDragObj.style.left = (nn6 ? nTX + e.clientX - x : nTX + event.clientX - x)+"px";
    return false;
    }
    }function initDrag(e) {
    var oDragHandle = nn6 ? e.target : event.srcElement;
    var topElement = "HTML";
    while (oDragHandle.tagName != topElement && oDragHandle.className != "dragAble") {
    oDragHandle = nn6 ? oDragHandle.parentNode : oDragHandle.parentElement;
    }
    if (oDragHandle.className=="dragAble") {
    isdrag = true;
    oDragObj = oDragHandle;
    nTY = parseInt(oDragObj.style.top+0);
    y = nn6 ? e.clientY : event.clientY;
    nTX = parseInt(oDragObj.style.left+0);
    x = nn6 ? e.clientX : event.clientX;
    document.onmousemove=moveMouse;
    return false;
    }
    }
    document.onmousedown=initDrag;
    document.onmouseup=new Function("isdrag=false");function clickMove(s){
    if(s=="up"){
    dragObj.style.top = parseInt(dragObj.style.top) + 100;
    }else if(s=="down"){
    dragObj.style.top = parseInt(dragObj.style.top) - 100;
    }else if(s=="left"){
    dragObj.style.left = parseInt(dragObj.style.left) + 100;
    }else if(s=="right"){
    dragObj.style.left = parseInt(dragObj.style.left) - 100;
    }}function smallit(){            
    var height1=images1.height;            
    var width1=images1.width;            
    images1.height=height1/1.2;            
    images1.width=width1/1.2;           
    }             
        
    function bigit(){            
    var height1=images1.height;            
    var width1=images1.width;            
    images1.height=height1*1.2;          
    images1.width=width1*1.2;           
    }             
    function realsize()
    {
    images1.height=images2.height;     
    images1.width=images2.width;block1.style.left = 0;
    block1.style.top = 0;}
    function featsize()
    {
    var width1=images2.width;            
    var height1=images2.height;            
    var width2=360;            
    var height2=200;            
    var h=height1/height2;
    var w=width1/width2;
    if(height1<height2&&width1<width2)
    {
    images1.height=height1;            
    images1.width=width1;           
    }
    else
    {
    if(h>w)
    {
       images1.height=height2;          
       images1.width=width1*height2/height1;           
    }
    else
    {
       images1.width=width2;           
       images1.height=height1*width2/width1;          
    }
    }
    block1.style.left = 0;
    block1.style.top = 0;
    }</SCRIPT>
    <script language="JavaScript" type="text/JavaScript">
    <!--
    function MM_reloadPage(init) { //reloads the window if Nav4 resized
    if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
        document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
    else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
    }
    MM_reloadPage(true);
    //-->
    </script>
    <style type="text/css">
    <!--
    td, a { font-size:12px; color:#000000 }
    #Layer1 {
    position:absolute;
    z-index:100;
    top: 18px;
    left: 19px;
    }
    #Layer2 { position:absolute; z-index:1; }
    -->
    </style>
    </head>
    <body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" onLoad="init();" oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false"onmouseup="document.selection.empty()" style="overflow-y:hidden;overflow-x:hidden;">
    <div id="Layer1">
    <table border="0" cellspacing="2" cellpadding="0">
        <tr>
          <td> </td>
          <td><img src="/comic/images/up.gif" width="20" height="20" style="cursor:hand" onClick="clickMove('up')" title="向上"></td>
          <td> </td>
        </tr>
        <tr>
          <td><img src="/comic/images/left1.gif" width="20" height="20" style="cursor:hand" onClick="clickMove('left')" title="向左"></td>
          <td><img src="images/zoom.gif" width="20" height="20" style="cursor:hand" onClick="realsize();" title="实际大小"></td>
          <td><img src="/comic/images/right1.gif" width="20" height="20" style="cursor:hand" onClick="clickMove('right')" title="向右"></td>
        </tr>
        <tr>
          <td> </td>
          <td><img src="/comic/images/down.gif" width="20" height="20" style="cursor:hand" onClick="clickMove('down')" title="向下"></td>
          <td> </td>
        </tr>
        <tr>
          <td> </td>
          <td><img src="images/zoom_in.gif" width="20" height="20" style="cursor:hand" onClick="bigit();" title="放大"></td>
          <td> </td>
        </tr>
        <tr>
          <td> </td>
          <td><img src="images/zoom_out.gif" width="20" height="20" style="cursor:hand" onClick="smallit();" title="缩小"></td>
          <td> </td>
        </tr>
    </table>
    </div>
    <p><br>
    <div id='hiddenPic' style='position:absolute; left:0px; top:0px; width:0px; height:0px; z-index:1; visibility: hidden;'><img name='images2' src='imagesview/images/rs4a.jpg' border='0'></div>
    <div id='block1' onmouseout='drag=0' onmouseover='dragObj=block1; drag=1;' style='z-index:10; height: 0; left: 0px; position: absolute; top: 0px; width: 0' class="dragAble"> <img src="imagesview/images/rs4a.jpg" name='images1' width="990"  border='0' ></div>
    </body>
    </html>
      

  3.   

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