var mab_initialHeight;

window.onload=function(){
	// Get height of content-DIV, necessary for mab_specialEffectElement-Extension
	mab_initialHeight = document.getElementById("content").offsetHeight;
	
	var browser = navigator.appName;
	var version = parseFloat(navigator.appVersion);

	var content = document.getElementById('middle');
	var left = document.getElementById('leftbox');
	var right = document.getElementById('rightbox');
	
	if(content && right && left ) {
	
		if(right.offsetHeight >= left.offsetHeight)
		{
			var element = right;
		}
		else
		{
			var element = left;
		}
		
		var leftColumn = document.getElementById('navigation');
		var rightColumn = document.getElementById('right');
		var contentColumn = document.getElementById('content');
		
		if(element.offsetHeight>content.offsetHeight){
			contentColumn.style.height = element.offsetHeight+"px";
			leftColumn.style.height = element.offsetHeight+"px";
			rightColumn.style.height = element.offsetHeight+"px";
		}
		else
		{
			contentColumn.style.height = content.offsetHeight+"px";
			leftColumn.style.height = content.offsetHeight+"px";
			rightColumn.style.height = content.offsetHeight+"px";
		}
	}
}