var img = document.contentBgImg;
var div1H = document.getElementById("content-column-1").clientHeight;
var div2H = document.getElementById("content-column-2").clientHeight;
var div3H = document.getElementById("content-column-3").clientHeight;

var maxH = div1H;

if (div1H < div2H) {
	maxH = div2H;
}
if (maxH < div3H) {
	maxH = div3H;
}
//alert(img.height);
//img.style.height = maxH + 40 + "px";
//alert(img.height);