// JavaScript Document
gelijkVak=function() {

	var divs=[], maxHeight, divHeight,d;

	maxHeight = 0;
		
	divs[0] = "contentcol1";
	divs[1] = "contentcol2";
	divs[2] = "contentcol3";
	
	
	for (i=0; i<divs.length; i++) {
		d = divs[i];
		if(document.getElementById(d).offsetHeight) {
			divHeight = document.getElementById(d).offsetHeight;
		} else if (document.getElementById(d).style.pixelHeight) {
			divHeight = document.getElementById(d).style.pixelHeight;
		}
	
		maxHeight=Math.max(maxHeight,divHeight);
	}
	
	for (i=0; i<divs.length; i++) {
		h = maxHeight + "px";
		document.getElementById(divs[i]).style.height=h;
	}
}