var myWin = null;

function popUp(url,med,pos) {
var ancho='566';
var alto='400';
var izq='176';
var arriba='150';


var _parms = 'width=' + ancho + ',height=' + alto + ',left=' + izq + ',top=' + arriba + ',scrollbars=yes,resizable=no';
myWin=window.open(url,"",_parms);
myWin.focus();
self.name = "mainWin";
}