<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
#div1 {width: 100px; height: 100px; background: red; position: absolute;}
#img1 { position: absolute;}
</style>
<script>
window.onload = function() {
var oDiv = document.getElementById('div1');
var oImg = document.getElementById('img1');
drag(oImg);
drag(oDiv);
function drag(obj) {
obj.onmousedown = function(ev) {
var ev = ev || event;
var disX = ev.clientX - this.offsetLeft;
var disY = ev.clientY - this.offsetTop;
if ( obj.setCapture ) {
obj.setCapture();
}
document.onmousemove = function(ev) {
var ev = ev || event;
obj.style.left = ev.clientX - disX + 'px';
obj.style.top = ev.clientY - disY + 'px';
}
document.onmouseup = function() {
document.onmousemove = document.onmouseup = null;
//释放全局捕获 releaseCapture();
if ( obj.releaseCapture ) {
obj.releaseCapture();
}
}
return false;
}
}
}
</script>
</head>
<body>
<div id="div1"></div>
<img src="1.jpg" id="img1" />
</body>
</html>
