JS and JQUERY get page size, scroll bar position, element position (sample code)_jquery

function GetPageSize() {
var scrW, scrH;
if(window.innerHeight && window.scrollMaxY)
{ // Mozilla
scrW = window.innerWidth window.scrollMaxX;
scrH = window.innerHeight window.scrollMaxY;
}
else if(document.body.scrollHeight > document.body.offsetHeight)
{ // all but IE Mac
scrW = document. body.scrollWidth;
scrH = document.body.scrollHeight;
} else if(document.body)
{ // IE Mac
scrW = document.body.offsetWidth;
scrH = document.body.offsetHeight;
}
var winW, winH;
if(window.innerHeight)
{ // all except IE  
winW = window.innerWidth;
winH = window.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight)
{ // IE 6 Strict Mode
winW = document.documentElement.clientWidth;
winH = document.documentElement .clientHeight;
} else if (document.body) { // other
winW = document.body.clientWidth;
winH = document.body.clientHeight;
} // for small pages with total size less then the viewport
var pageW = (scrWvar pageH = (scrHreturn {PageW:pageW, PageH:pageH , WinW:winW, WinH:winH};

};

//Scroll bar position
function GetPageScroll()
{
var x, y; if(window.pageYOffset)
{ / / all except IE
y = window.pageYOffset;
x = window.pageXOffset;
} else if(document.documentElement && document.documentElement.scrollTop)
{ // IE 6 Strict
y = document.documentElement.scrollTop;
x = document.documentElement.scrollLeft;
} else if(document.body) { // all other IE
y = document.body.scrollTop;
x = document.body.scrollLeft;
}
return {X:x, Y:y};

}