window.onload = newWinLinks;

function newWinLinks() {
	for (var i=0; i<document.links.length; i++) {
		if (document.links[i].className == "newWin") {
			document.links[i].onclick = newWindow;
		}
	}
}

function newWindow() {
	var abreVentana = window.open(this.href,"estaVentana","resizable=yes,width=800,height=600,scrollbars=yes");
	abreVentana.focus();
	return false;
}