function clearText(field){

    if (field.defaultValue == field.value)
    {
        field.value = '';
        document.getElementById("Zoeken").disabled=false;
    }
    else if (field.value == '')
    {
        field.value = field.defaultValue;
        document.getElementById("Zoeken").disabled=true;
    }

}
function loader()
{
    $("#content").html("<img src='/belnu/images/static/ajax-loader.gif'> Moment..");
}

function submitenter(myfield,e)
{
    var keycode;
    if (window.event) keycode = window.event.keyCode;
    else if (e) keycode = e.which;
    else return true;

    if (keycode == 13)
       {
           myfield.form.submit();
           loader();
           zoekWaarde(document.headerSearch.zoekstring.value);
           return false;
       }
    else
       return true;
}