<!-- parte que abre a janela
// A LETRA S ABRE AUMENTA E A LETRA F DIMINUI
var arrKeys = new Array("s","f"); 
var arrURLs = new Array("javascript:janela()","javascript:window.close(self)");

if( arrKeys.length != arrURLs.length )
alert("Especifique a letra da Url.");
if (document.layers)
document.captureEvents(Event.KEYPRESS)
function keyNav(e)
{
var strFromCode;
var strFromArr;
if (document.layers)
strFromCode = String.fromCharCode(e.which);
else if (document.all)
strFromCode = String.fromCharCode(event.keyCode);
strFromCode = strFromCode.toLowerCase()
for(i = 0; i < arrKeys.length; i++)
{
strFromArr = arrKeys[i].toLowerCase();
if(strFromArr == strFromCode)
{
window.location=arrURLs[i];
return(true);
}
}
return(true);
}
document.onkeypress=keyNav;
// -- parte que abre a janela -->

<!-- abre e fecha a janela
function janela() {
//if (this.name!='fullscreen'){ 
  window.open(location.href,'fullscreen','fullscreen,scrollbars') 
} 
//-->