关于图片拖动的问题，紧急求救

web form的分辨率为1024X768，有一张图片的尺寸是大于1024X768的，在web form中显示，要求不用显示完整张图片，而是通过鼠标拖动来看到图片的其他部分，请问这个该怎么显示呢？谢谢

解决方案 »

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<style> {
box-sizing: border-box; moz-box-sizing: border-box
}
#testDiv     { background-color: buttonface; background-repeat: repeat;
                background-attachment: scroll;color: #3969A5; height: 300px;
               left: 30px; overflow: hidden; width: 500; z-index: 2;
               border: 2px outset white; margin: 0px; padding: 2px;
               background-position: 0% 50% }
body         { font-family: Verdana; font-size: 9pt }
#innerNice   { background-color: white; background-repeat: repeat; background-attachment:
               scroll; color: #3969A5; height: 100%; overflow:hidden; width:
               100%; border: 2px inset white; padding: 8px;
               background-position: 0% 50% }
</style>
<div class="resizeMe" id="testDiv">
  <div id="innerNice">
    <img src="r_atlas.jpg" width="100%" height="100%">
  </div>
</div>
<SCRIPT language=javascript>
/////////////////////////////////////////////////////////////////////////
// Generic Resize by Erik Arvidsson                                    //
//                                                                     //
// You may use this script as long as this disclaimer is remained.     //
// See www.dtek.chalmers.se/~d96erik/dhtml/ for mor info               //
//                                                                     //
// How to use this script!                                             //
// Link the script in the HEAD and create a container (DIV, preferable //
// absolute positioned) and add the class="resizeMe" to it.            //
/////////////////////////////////////////////////////////////////////////var theobject = null; //This gets a value as soon as a resize startfunction resizeObject() {
this.el        = null; //pointer to the object
this.dir    = "";      //type of current resize (n, s, e, w, ne, nw, se, sw)
this.grabx = null;     //Some useful values
this.graby = null;
this.width = null;
this.height = null;
this.left = null;
this.top = null;
}
//Find out what kind of resize! Return a string inlcluding the directions
function getDirection(el) {
var xPos, yPos, offset, dir;
dir = ""; xPos = window.event.offsetX;
yPos = window.event.offsetY; offset = 8; //The distance from the edge in pixels if (yPos<offset) dir += "n";
else if (yPos > el.offsetHeight-offset) dir += "s";
if (xPos<offset) dir += "w";
else if (xPos > el.offsetWidth-offset) dir += "e"; return dir;
}function doDown() {
var el = getReal(event.srcElement, "className", "resizeMe"); if (el == null) {
theobject = null;
return;
} dir = getDirection(el);
if (dir == "") return; theobject = new resizeObject();

theobject.el = el;
theobject.dir = dir; theobject.grabx = window.event.clientX;
theobject.graby = window.event.clientY;
theobject.width = el.offsetWidth;
theobject.height = el.offsetHeight;
theobject.left = el.offsetLeft;
theobject.top = el.offsetTop; window.event.returnValue = false;
window.event.cancelBubble = true;
}function doUp() {
if (theobject != null) {
theobject = null;
}
}
function doMove() {
var el, xPos, yPos, str, xMin, yMin;
xMin = 8; //The smallest width possible
yMin = 8; //             height el = getReal(event.srcElement, "className", "resizeMe"); if (el.className == "resizeMe") {
str = getDirection(el);
//Fix the cursor
if (str == "") str = "default";
else str += "-resize";
el.style.cursor = str;
}

//Dragging starts here
if(theobject != null) {
if (dir.indexOf("e") != -1)
theobject.el.style.width = Math.max(xMin, theobject.width + window.event.clientX - theobject.grabx) + "px";

if (dir.indexOf("s") != -1)
theobject.el.style.height = Math.max(yMin, theobject.height + window.event.clientY - theobject.graby) + "px"; if (dir.indexOf("w") != -1) {
theobject.el.style.left = Math.min(theobject.left + window.event.clientX - theobject.grabx, theobject.left + theobject.width - xMin) + "px";
theobject.el.style.width = Math.max(xMin, theobject.width - window.event.clientX + theobject.grabx) + "px";
}
if (dir.indexOf("n") != -1) {
theobject.el.style.top = Math.min(theobject.top + window.event.clientY - theobject.graby, theobject.top + theobject.height - yMin) + "px";
theobject.el.style.height = Math.max(yMin, theobject.height - window.event.clientY + theobject.graby) + "px";
}

window.event.returnValue = false;
window.event.cancelBubble = true;
}
}
function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}document.onmousedown = doDown;
document.onmouseup   = doUp;
document.onmousemove = doMove;
</SCRIPT>
xiaohuasz()：
    不好意思，你上面给出的代码我试了一下，好像并不能实现图片的移动，只是另外打开了一个窗口显示完整的图片，是吗？
不好意思，看错题意了，不知你要的是不是下面的效果
<style type="text/css">

</style>
<img src="r_atlas.gif" id="drag"><script type="text/javascript">

</script>