function resize() {
	var res = this;
	var height = document.getElementById('busqRelacionadas').offsetHeight;
	var finHeight = (height > 20) ? 20 : 40;
	var newHeight = 0;
	var inc = (document.all) ? 1 : 7;
	if (typeof re != 'undefined') clearInterval(re);
	re = setInterval(function() {
		newHeight = (finHeight >= height) ? Math.min(height + 3, finHeight) : Math.max(height - 3, finHeight);
		document.getElementById('busqRelacionadas').style.height = newHeight+'px';
		height = newHeight;
		if (newHeight == finHeight) {
			clearInterval(re); 
			(height > 20) ? document.getElementById('arrowVerMas').src = "http://imagenesweb.solostocks.com/upArrow.gif" : document.getElementById('arrowVerMas').src = "http://imagenesweb.solostocks.com/downArrow.gif";
		}
	}, inc);
}