function pantallacompleta (pagina) 
{
//var opciones=("width=950,height=695,top=1,left=1,toolbar=no,location=no,directories=no,status=no,menubar=yes,scrollbars=no,resizable=yes, fullscreen=no"); 
//window.open(pagina,"",opciones);

   var wOpen;
   var sOptions;

   sOptions = 'status=no,menubar=yes,scrollbars=no,resizable=yes,toolbar=no';
   sOptions = sOptions + ',width=' + (screen.availWidth - 10).toString();
   sOptions = sOptions + ',height=' + (screen.availHeight - 122).toString();
   sOptions = sOptions + ',screenX=0,screenY=0,left=0,top=0';

   wOpen = window.open( '', '', sOptions );
   wOpen.location = pagina;
   wOpen.focus();
   wOpen.moveTo( 0, 0 );
   wOpen.resizeTo( screen.availWidth, screen.availHeight );
   //return wOpen;

}

var treMen = null; 
 function abrirRegistro(){ 
 		var url = "/aguas/Registro?opc=1"; 
 	//	var url = "blanck"; 
		treMen=window.open('','Ventana','toolbar=no,scrollbars=yes,location=no,directories=no,menubar=no,resizable=yes,left=200,top=150,width=450,height=350');
		treMen.location.href=url; 
		if(treMen.opener==null) 
			treMen.opener=self; 
 	}//fin de abrir ventana