function checkKeyCode(e, value) {
    var characterCode //literal character code will be stored in this variable
    if (e && e.which) { //if which property of event object is supported (NN4)
        e = e
        characterCode = e.which //character code is contained in NN4's which property
    }
    else {
        e = event
        characterCode = e.keyCode //character code is contained in IE's keyCode property
    }
    switch (characterCode) {
        case 8:case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:case 96:case 97:case 98:case 99:case 100:
        case 101:case 102:case 103:case 104:case 105:
            if (value != "")
                return false;
            else
                return true;
            break;
    }
    return true;

}

function ShowMailAFriend(title, productID, productName) {
    tb_show(title, '/Thickboxes/tb_MailAFriend.aspx?A=' + productID + '&KeepThis=true&TB_iframe=true&width=400&height=570', '');
}

function ShowNewsletter(title) {
    tb_show(title, '/Thickboxes/tb_Newsletter.aspx?KeepThis=true&TB_iframe=true&width=405&height=170', '');
}