function cargando(){
ddocument.getElementById('conload').style.display='block';
document.getElementById('cargando').style.display='block';

}

//Abrir ventanas con ajax
function abrirventana(pag,titlen)
{
//new Window({url: pag, className: "alphacube", top:160, left:250, width:600, height:600,showCentered :true,showEffectOptions: {duration:1.5} }).show()
//WindowCloseKey.init();

titlen="";
//alto = document.getElementById('contenido-curso').offsetHeight;
win = new Window('window_id', {className: "alphacube",title: titlen, draggable:false,resizable:false,width:"575",height:"500",top:200})
win.setURL(pag);
win.showCenter("top");
//win.minimize(1);
//win.updateHeight();
win.setDestroyOnClose();
                               
 }