/* Make sure that the page height is at least one screenful 

   Taken from: http://www.alistapart.com/articles/footers/
*/

function getWindowHeight() {
	var windowHeight=0;
	if (typeof(window.innerHeight)=='number') {
		windowHeight=window.innerHeight;
	} else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight= document.documentElement.clientHeight;
		} else {
			if (document.body&&document.body.clientHeight) {
				windowHeight=document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}

function adjustFooter() {
	if (document.getElementById) {
		var windowHeight=getWindowHeight();
		if (windowHeight>0) {

			totalHeight = document.getElementById('container').offsetHeight;

			var footerElement= document.getElementById('footer');
			var footerHeight=footerElement.offsetHeight;
						
			var contentElement= document.getElementById('pageContents');
			var contentHeight = contentElement.offsetHeight;						
			
			var leftElement = document.getElementById('leftNavi');			
			var leftHeight = leftElement.offsetHeight;
			
			var rightElement = document.getElementById('rightNavi');
			var rightHeight = rightElement.offsetHeight;
			
			var maxHeight = contentHeight;
			if (leftHeight > maxHeight) { maxHeight = leftHeight; }
			if (rightHeight > maxHeight) { maxHeight = rightHeight; }
			
			
//			if (windowHeight > totalHeight) {						
			if (maxHeight > contentHeight) {			
				/* Expand main content area to fill empty space */				
				contentElement.style.height=maxHeight + "px";
			} 
		}
	}
}

registerPloneFunction(adjustFooter);