$(function() {
	$('a[rel=external]').attr('target','_blank');
  setHeight('.col');
});
	
var maxHeight = 0;
function setHeight(col) {
	col = $(col);
  col.each(function() {        
		if($(this).height() > maxHeight) {
    	maxHeight = $(this).height();;
    }
	});
  col.height(maxHeight); 
};