initialize = function(){
	if(dom2){
		if(document.getElementById('content')){
			var height = parseInt(document.getElementById('content').offsetHeight);
			/* Voor internet explorer -29px */
			setHeight('left_content',height);
			setHeight('center_content',height);
			setHeight('right_content',height);			
		}						   
	}
}

setHeight = function(obj,height){
	if(document.getElementById(obj)){
		document.getElementById(obj).style.height = height+'px';
	}
}