CSS部分
<style type="text/css">
body{height: 3000px;
width: 3000px;}
#div1{
height: 100px;
width: 100px;
background-color: #ccc;
position: absolute;
}
</style>
HTML部分
<div id="div1">DFDSF</div>
我发的思考附近的刷卡费的口附近的思考的撒发开急速
</body>
JS部分
<script type="text/javascript">
window.onload=function (){
var oDiv=document.getElementById("div1");
var maxHeight=document.documentElement.clientHeight-oDiv.offsetHeight;
var maxWidth=document.documentElement.clientWidth-oDiv.offsetWidth;
oDiv.onmousedown=function (e){
var oEvent=e||window.event;
var disX=oEvent.clientX-oDiv.offsetLeft;
var disY=oEvent.clientY-oDiv.offsetTop;
var bodyScrollTop=document.body.scrollTop||document.documentElement.scrollTop;
var bodyScrollLeft=document.body.scrollLeft||document.documentElement.scrollLeft;
document.onmousemove=function (ev){
var oEvent=ev||window.event;
var x=oEvent.clientX-disX;
var y=oEvent.clientY-disY;
if(y<=bodyScrollTop){
y=bodyScrollTop;
}else if(y>=maxHeight+bodyScrollTop){
y=bodyScrollTop+maxHeight;
}
if(x<=bodyScrollLeft){
x=bodyScrollLeft;
}else if(x>=bodyScrollLeft+maxWidth){
x=bodyScrollLeft+maxWidth;
}
document.title=y;
oDiv.style.left=x+"px";
oDiv.style.top=y+"px";
}
document.onmouseup=function (){
if(oDiv.releaseCapture){
oDiv.releaseCapture();
}
document.onmousemove=null;
}
if(oDiv.setCapture){
oDiv.setCapture();
}
return false;
}
}
</script>
Javascript:实操---拖拽(完整版)