div页面底部对齐[提取修改]

<script language="javascript" type="text/javascript">

function $()

{

return document.getElementById?document.getElementById(arguments[0]):eval(arguments[0]);

}

var Sys = {};

var ua = navigator.userAgent.toLowerCase();

if (window.ActiveXObject)

Sys.ie = ua.match(/msie ([\d.]+)/)[1]

else if (document.getBoxObjectFor)

Sys.firefox = ua.match(/firefox\/([\d.]+)/)[1]

else if (window.MessageEvent && !document.getBoxObjectFor)

Sys.chrome = ua.match(/chrome\/([\d.]+)/)[1]

else if (window.opera)

Sys.opera = ua.match(/opera.([\d.]+)/)[1]

else if (window.openDatabase)

Sys.safari = ua.match(/version\/([\d.]+)/)[1];

function getClientBounds()

{

var clientWidth;

var clientHeight;

if (Sys.ie)

{

clientWidth = document.body.clientWidth;

clientHeight = document.body.clientHeight;

}

else if (Sys.safari)

{

clientWidth = window.innerWidth;

clientHeight = window.innerHeight;

}

else if (Sys.opera )

{

clientWidth = Math.min(window.innerWidth, document.body.clientWidth);

clientHeight = Math.min(window.innerHeight, document.body.clientHeight);

}

else

{

clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);

clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);

}

return { width : clientWidth, height : clientHeight };

}

function resetLiveMessengerPosition()

{

var clientBounds = getClientBounds();

var container = document.getElementById("liveMessengerContainer");

var scrollLeft = (document.documentElement.scrollLeft ?

document.documentElement.scrollLeft : document.body.scrollLeft);

var scrollTop = (document.documentElement.scrollTop ?

document.documentElement.scrollTop : document.body.scrollTop);

var containerLeft = scrollLeft + clientBounds.width - container.clientWidth - 5;

var containerTop = scrollTop + clientBounds.height - container.clientHeight;

$("liveMessengerContainer").style.top=containerTop + "px";

$("liveMessengerContainer").style.left=containerLeft + "px";

}

window.onscroll=function(){resetLiveMessengerPosition();};

window.onresize=function(){ resetLiveMessengerPosition();};

window.onload=function(){ resetLiveMessengerPosition();};

</script>