js获得屏幕宽度，网页宽度程序代码

function screenInfo(){
var s = "";
s += "/r/n网页可见区域宽："+ document.body.clientWidth;
s += "/r/n网页可见区域高："+ document.body.clientHeight;
s += "/r/n网页可见区域宽："+ document.body.offsetWidth +" (包括边线的宽)";
s += "/r/n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";
s += "/r/n网页正文全文宽："+ document.body.scrollWidth;
s += "/r/n网页正文全文高："+ document.body.scrollHeight;
s += "/r/n网页被卷去的高："+ document.body.scrollTop;
s += "/r/n网页被卷去的左："+ document.body.scrollLeft;
s += "/r/n网页正文部分上："+ window.screenTop;
s += "/r/n网页正文部分左："+ window.screenLeft;
s += "/r/n屏幕分辨率的高："+ window.screen.height;
s += "/r/n屏幕分辨率的宽："+ window.screen.width;
s += "/r/n屏幕可用工作区高度："+ window.screen.availHeight;
s += "/r/n屏幕可用工作区宽度："+ window.screen.availWidth;
alert(s);
}
screenInfo();

function calc_scroll_xy()
{
_browser_scroll_x = 0;
_browser_scroll_y = 0;
if( typeof( window.pageyoffset ) == 'number' )
{
//netscape compliant
_browser_scroll_y = window.pageyoffset;
_browser_scroll_x = window.pagexoffset;
} else if( document.body && ( document.body.scrollleft || document.body.scrolltop ) )
{
//dom compliant
_browser_scroll_y = document.body.scrolltop;
_browser_scroll_x = document.body.scrollleft;
}
else if( document.documentelement && ( document.documentelement.scrollleft || document.documentelement.scrolltop ) )
{
//ie6 standards compliant mode
_browser_scroll_y = document.documentelement.scrolltop;
_browser_scroll_x = document.documentelement.scrollleft;
}
}