function setCenterColDivHeight() {
	
	leftCol_height = document.getElementById('left_col').offsetHeight;
	rightCol_height = document.getElementById('right_col').offsetHeight;
	//alert(leftCol_height);
	
	if(leftCol_height > rightCol_height) {
		document.getElementById('center_col').style.height = leftCol_height + 5 + "px";
	} else {
		document.getElementById('center_col').style.height = rightCol_height + 5 + "px";
	}
	
}