function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function bNavegador() {
  if( navigator.appName )
  {
    if( navigator.appName == "Microsoft Internet Explorer")  return 1;
    if( navigator.appName == "Netscape")  return 2;
  }
  return 0;
}

function AbreVentana(pagina,nombre){
  var w=640, h=480;
  var windowName = nombre;
  var x = bNavegador();	
  if (window.screen && window.screen.availHeight) {
    h = window.screen.availHeight - 63; // 63
    if( x==2 ) h = h - 11;
    w = window.screen.availWidth - 4;
  }

  window.open(pagina, windowName, "status=yes,resizable=yes,toolbar=no,scrollbars=yes,top=0,left=0,width=" + w + ",height=" + h, 1 );
}

function fCambio(combo)
{
	if (combo.options[combo.selectedIndex].value!="")
		window.open(combo.options[combo.selectedIndex].value,'_blank');
}