gistfile1.txt

$(this).removeClass(function(index, cls) {
			    var classes = cls.split(' ');
			    var result = new Array();
			    $.each(classes, function(index, value) {
			    	if(value.substring(0, 3) == 'col') {
			        result.push(value);
			        saveCol = saveCol + value;
			      }
			    });
			    return result.join(' ');
			});