function divEqualHeights(div_one, div_two) {
		var first_height = document.getElementById(div_one).offsetHeight;
		var second_height = document.getElementById(div_two).offsetHeight;
		var new_height = Math.max(first_height, second_height);
		document.getElementById(div_one).style.height = new_height + "px";
		document.getElementById(div_two).style.height = new_height + "px";
}

window.onload=function(){
	divEqualHeights("sidebar", "main-content");
}