function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function abreventana(url, name, w, h, perc) {
        var winX = (screen.availWidth - w)*perc*.01;
        var winY = (screen.availHeight - h)*perc*.01;
        popupWin = window.open(url, name,'toolbar=0,location=0,directories=0,status=yes,menubar=0,scrollbars=0,resizable=0,width=' + w + ',height=' + h + ',left=' + winX + ',top=' + winY);
}