function resize() { 
	 var heightA = document.getElementById("col").offsetHeight;
	 var heightC = document.getElementById("content").offsetHeight;
	 
     if(heightA < heightC  ){
					 
	 var maxHeight = Math.max(heightA, heightC);  
	 document.getElementById("col").style.height = (maxHeight) + 'px'; 
	 }
	 }