$(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);
};