function open_popup(url, width, height) 
{
    day = new Date();
    id = day.getTime();
    eval("page" + id + " = window.open(url,'" + id + "','toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=' + width + ',height=' + height);");
}

function check_contact_form()
{
    var error_message = "";
    
    if (!IsName(document.getElementById('contact_first_name').value))
        error_message += "First Name\n";
    if (!IsName(document.getElementById('contact_last_name').value))
        error_message += "Last Name\n";
    if (!IsEmail(document.getElementById('contact_email').value))
        error_message += "Email Address\n";
    if (IsEmpty(document.getElementById('contact_message').value))
        error_message += "Message\n";

    if (error_message != "") 
    {
        error_message = "Please Fix the following Field(s):\n\n" + error_message;
        alert(error_message);
        return false;
    }
    return true;
}