function Abrir(theURL) {
	var leftmargin = (screen.width - 500) / 2;
	var topmargin = (screen.height - 450) / 2;
	var features = 'width=520,height=450,scrollbars=yes';
	features=features + ',top=' + topmargin + ',left='+ leftmargin
	  window.open(theURL,'Productos',features);
}


function cambiaLinks(){
	var links = document.getElementsByTagName('a');
	for (var i=0;i < links.length;i++) {
		if (links[i].rel == 'external') {
			links[i].onclick = function() { window.open(this.href); return false;};
		}
		if (links[i].rel == 'popup') {
			links[i].onclick = function() {
			window.open(this.href, "ventana", "location=0,status=0,scrollbars=1,width=600,height=540");
			return false;
			};
		}
	}
}