Getting the page height

[Brendan Vogt]

Hi, I am trying to get the height of the page after the page loads everything, I currently used document.body.scrollHeight but now it keeps on returning 0, no matter in want page event I add it. I am using ASP.NET 2.0. Thanks

[Craig G Fraser]

The method to get the height differs depending in what browser you are using. I have a javascript function that i use to center an element on a screen. This determines the browser being used and uses the correct method accordingly. Hope this helps.

// centers an element on the screen
function centerElement(element, left, top)
{
var x = document.body.scrollWidth;
var y = document.body.scrollHeight;
if (getBrowser().indexOf('IE') == 0)
{
x = document.documentElement.clientWidth;
y = document.documentElement.clientHeight;
}
x = (x / 2) + document.body.scrollLeft - (element.offsetWidth / 2);
y = (y / 2) + document.body.scrollTop - (element.offsetHeight / 2);
if (arguments.length < 2) left = true;
if (left) element.style.left = x + 'px';
if (arguments.length < 3) top = true;
if (top) element.style.top = y + 'px';
}

// method to determine the browser for browser-specific javascript.
// Currently returns a string with possible values IE6, IE7, Firefox, Other
function getBrowser()
{
if (navigator.appName == 'Microsoft Internet Explorer')
{
return 'IE' + parseFloat((new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})")).exec(navigator.userAgent)[1]);
}
else if (navigator.userAgent.toLowerCase().indexOf('firefox') > -1)
{
return 'Firefox';
}

return 'Other';

}

Cheers, Craig ** I'd rather try and fail than fail to try ;) **