function doSearchClick(buttonName, e) {
    var key;

    if (window.event)
        key = window.event.keyCode;     //IE
    else
        key = e.which;     //firefox

    if (key == 13) {
        var button = document.getElementById(buttonName);
        if (button != null) {
            button.click();
            event.keyCode = 0
        }
    }
}