<script><br />
window.onload = function ()<br />
{<br />
var oWin = document.getElementById("win");<br />
var oBtn = document.getElementsByTagName("button")[0];<br />
var oClose = document.getElementById("close");<br />
var oH2 = oWin.getElementsByTagName("h2")[0];<br />
var bDrag = false;<br />
var disX = disY = 0;<br />
oBtn.onclick = function ()<br />
{<br />
oWin.style.display = "block" <br />
};<br />
oClose.onclick = function ()<br />
{<br />
oWin.style.display = "none"<br />
<br />
};<br />
oClose.onmousedown = function (event)<br />
{<br />
(event || window.event).cancelBubble = true;<br />
};<br />
oH2.onmousedown = function (event)<br />
{ <br />
var event = event || window.event;<br />
bDrag = true;<br />
disX = event.clientX - oWin.offsetLeft;<br />
disY = event.clientY - oWin.offsetTop; <br />
this.setCapture && this.setCapture(); <br />
return false<br />
};<br />
document.onmousemove = function (event)<br />
{<br />
if (!bDrag) return;<br />
var event = event || window.event;<br />
var iL = event.clientX - disX;<br />
var iT = event.clientY - disY;<br />
var maxL = document.documentElement.clientWidth - oWin.offsetWidth;<br />
var maxT = document.documentElement.clientHeight - oWin.offsetHeight; <br />
iL = iL < 0 ? 0 : iL;<br />
iL = iL > maxL ? maxL : iL; <br />
iT = iT < 0 ? 0 : iT;<br />
iT = iT > maxT ? maxT : iT;<br />
<br />
oWin.style.marginTop = oWin.style.marginLeft = 0;<br />
oWin.style.left = iL + "px";<br />
oWin.style.top = iT + "px"; <br />
return false<br />
};<br />
document.onmouseup = window.onblur = oH2.onlosecapture = function ()<br />
{<br />
bDrag = false; <br />
oH2.releaseCapture && oH2.releaseCapture();<br />
};<br />
};<br />
</script>
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希望本文所述对大家的javascript程序设计有所帮助。
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