JavaScript拖拽效果示例网页解决快速拖拽的问题

时间:2020-05-13 人气:0

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>JavaScript拖拽示例网页——解决快速拖拽的问题</title> 
<meta name="Description" content="JavaScript拖拽文章的配套示例网页。本例解决了快速拖拽的时候元素停止移动的问题。" /> 
<meta name="Keywords" content="拖拽,实例,DOM,JavaScript,JScript" /> 
<style type="text/css"> 
.drag{border:1px solid; width:400px; background:#CCCCCC;} 
#test1{ top:20px;} 
#test2{ left:40px;} 
</style> 
<script type="text/javascript"> 
var dragElement = null; 
var mouseY; 
var mouseX; 
var x=""; 
var y=""; 
var max = 1; 
function dragInit(node){ 
if(node.className == "drag"){ 
node.onmousedown = down; 
document.onmousemove = move; 
node.onmouseover = over; 
node.style.position = "relative"; 
node.dragging = false; 
} 
var children = node.childNodes; 
for(var i = 0;i < children.length; i++){ 
dragInit(children[i]); 
} 
} 
window.onload = function(){ 
dragInit(document); 
document.onmouseup = docUp; 
} 
function down(event) 
{ 
event = event || window.event; 
dragElement = this; 
mouseX = parseInt(event.clientX); 
mouseY = parseInt(event.clientY); 
objY = parseInt(getNodeStyle(dragElement,"top")); 
objX = parseInt(getNodeStyle(dragElement,"left")); 
//IE不返回未设置的CSS属性 
if(!objY)objY=0; 
if(!objX)objX=0; 
this.style.zIndex = max++; 
} 
function move(event){ 
event = event || window.event; 
if(dragElement){ 
var x,y; 
y = event.clientY - mouseY + objY; 
x = event.clientX - mouseX + objX; 
dragElement.style.top = y + "px"; 
dragElement.style.left = x + "px"; 
//移动完元素之后，延迟一段时间 
document.onmousemove = null; 
setTimeout("document.onmousemove = move;",40); 
} 
} 
function docUp(){ 
dragElement = null; 
} 
function over(){ 
this.style.cursor = "move"; 
} 
function getNodeStyle(node,styleName){ 
var realStyle = null; 
if(node.currentStyle){ 
realStyle = node.currentStyle[styleName]; 
}else if(window.getComputedStyle){ 
realStyle = window.getComputedStyle(node,null)[styleName]; 
} 
return realStyle; 
} 
</script> 
</head>

<body> 
<div> 
<p>我是拖拽示例DIV1。</p> 
<p>可以试验一下效果。</p> 
</div> 
<div> 
<p>我是拖拽示例DIV2。</p> 
</div> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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