<!DOC[wiki]type[/wiki] html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html [wiki]XML[/wiki]ns="http://www.w3.org/1999/xhtml" >
<head>
<title>Drag and Drop Demo</title>
<style type="text/css">
.dragElement
{
background-color:Green;
[wiki]POS[/wiki]ition:absolute;
z-index:5000;
display: block;
padding-top:30px;
}
.dropZone
{
background-color:Bl[wiki]UE[/wiki];
width:300px;
height:300px;
position:absolute;
top:100px;
right:200px;
}
.highlightDropZone
{
background-color:Yellow;
}
.DefaultDropZoneColor
{
background-color:Blue;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<div id="a" class="dragElement">拖拽窗口 </div>
<div id="dZone" style="position:absolute; top:100px; right:200; width:300px; height:300px" class="DefaultDropZoneColor">
放开区域 1
</div>
<div id="dZone2" class="DefaultDropZoneColor" style="position:absolute; top:500px; right:200px; width:300px; height:300px">
放开区域 2
</div>
<div id="dZone3" class="DefaultDropZoneColor" style="position:absolute; top:300;right:100px; width:100px; height:200px">
放开区域 3
</div>
</div>
</form>
</body>
</html>
<script language="javascript" type="text/javascript">
var dropZoneArray = new Array(5);
dropZoneArray[0] = "dZone";
dropZoneArray[1] = "dZone2";
dropZoneArray[2] = "dZone3";
var mouseState = 'up';
function MakeElementDraggable(obj)
{
var startX = 0;
var startY = 0;
function InitiateDrag(e)
{
var evt = e || window.event;
startX = parseInt(evt.clientX);
startY = parseInt(evt.clientY);
obj.style.top = parseInt(startY) + 'px';
obj.style.left = parseInt(startX) + 'px';
document.onmousemove = Drag;
document.onmouseup = Drop;
return false;
}
function Drop(e)
{
var evt = e || window.event;
// check that if we are in the drop zone
if(IsInDropZone(evt))
{
document.onmouseup = null;
document.onmousemove = null;
}
}
function Drag(e)
{
// only drag when the mouse is down
var dropZone[wiki]object[/wiki];
var evt = e || window.event;
obj.style.top = evt.clientY + 'px';
obj.style.left = evt.clientX + 'px';
// Check if we are in the drop Zone
if(IsInDropZone(evt))
{
dropZoneObject = evt.srcElement;
dropZoneObject.className = 'highlightDropZone';
}
else
{
ResetColor();
}
}
a.onmousedown = InitiateDrag;
}
function ResetColor()
{
document.getElementById("dZone").className = 'DefaultDropZoneColor';
document.getElementById("dZone2").className = 'DefaultDropZoneColor';
document.getElementById("dZone3").className = 'DefaultDropZoneColor';
}
function IsInDropZone(evt)
{
var result = false;
var obj = evt.srcElement;
// iterate through the array and find it the id exists
for(i = 0; i < dropZoneArray.length; i++)
{
if(obj.id == dropZoneArray
)
{
result = true;
break;
}
}
return result;
}
// make the element draggable
window.onload = MakeElementDraggable(document.getElementById("a"));
</script>gf
