function AbrirVentana(a)
{
    string="toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=700,height=600";
  fin=window.open(a,"",string);
}
function AbrirVentana20(a)
{  
  string="toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=800,height=800, left=0, top=0";
  fin=window.open(a,"",string);
}

function AbrirVentana1(a)
{
    string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=520";
  fin=window.open(a,"",string);
}

function Abrircroquis(a)
{
    string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=740,height=700";
  fin=window.open(a,"",string);
}
function Abrirtres_de(a)
{
    string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=650,height=480";
  fin=window.open(a,"",string);
}
function mapas(a)
{
    string="toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=550,height=406";
  fin=window.open(a,"",string);
}

function cerrar(){
var ventana = window.self;
ventana.opener = window.self;
ventana.close();
}