function test_data(field) {
     var value = field.value;          // get input value
// Change the backgroundColor of the input field based on whether or not
// the value of the input field is a number.
     if(isNaN(value)) {
          field.style.color = 'red';
     } else {
          field.style.color = 'black';
     }
}

function buscarVenta (pagina) {
    document.forms.formBuscar.action= "venta.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function buscarAlquiler (pagina) {
    document.forms.formBuscar.action= "alquiler.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function buscar (pagina) {
    document.forms.formBuscar.action= "busqueda.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function buscarVentaIng (pagina) {
    document.forms.formBuscar.action= "sales.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function buscarAlquilerIng (pagina) {
    document.forms.formBuscar.action= "rentals.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function buscarIng (pagina) {
    document.forms.formBuscar.action= "search.php?pagina=" + pagina;
    document.forms.formBuscar.submit();
}

function ocultarPrecio()  {
    if ((document.getElementById("divPrecio")).style.display!="none") {
        (document.getElementById("divPrecio")).style.display="none";
    } else {
        (document.getElementById("divPrecio")).style.display="block";
    }
}