$(document).ready( function(){
	// $('#content').attr('style', 'margin-top: 0;');
	
	var content_top = document.getElementById('content').offsetTop;
	var footer_top = document.getElementById('footer').offsetTop;
	var center_height = footer_top - content_top;
	$('#colcenter').attr('style', 'height: '+center_height+'px;');
});