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涉及鼠标三个事件:
onmousedown、onmousemove、onmouseup
<script type = "text/javascript">
var body = document.getElementsByTagName(‘body‘)[0];
//生成div,并设置其样式
var box = document.createElement(‘div‘);
box.style.width = ‘100px‘;
box.style.height = ‘100px‘;
box.style.background = ‘blue‘;
box.style.position = ‘absolute‘;
box.onmousedown = function(event) {
event = event || window.event;
//获取鼠标点击的位置距离div左边的距离
var positionX = event.clientX - box.offsetLeft;
var positionY = event.clientY - box.offsetTop;
document.onmousemove = function(event) {
event = event || window.event;??
var divX = event.clientX - positionX;
var divY = event.clientY - positionY;
box.style.left = divX + ‘px‘;
box.style.top = divY + ‘px‘;
}
document.onmouseup = function() {
document.onmousemove = null;
}?
}
body.appendChild(box);
</script>
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原文地址:http://www.cnblogs.com/zhao12354/p/5762406.html