function check_order_form()
{
    if (
        requiered_field(document.forms["order"].size) &&
        requiered_field(document.forms["order"].qty) &&
        requiered_field(document.forms["order"].email) &&
        checkEmailAddress(document.forms["order"].email)
        )
    document.forms["order"].submit();
    else return false;
}

function check_contactus_form()
{
    if (requiered_field(document.forms["contactus"].name) &&
        requiered_field(document.forms["contactus"].email) &&
        requiered_field(document.forms["contactus"].message) &&
        checkEmailAddress(document.forms["contactus"].email)
        )
    document.forms["contactus"].submit();
    else return false;
}

function requiered_field(field)
{
    if (field.value == '')
    {
        field.focus();
        field.select();
        return false;
    }
    else
    return true;
}

function checkEmailAddress(field) {
    var goodEmail = field.value.search(/^[^\.]*[A-Za-z0-9_\-\.]*[^\.]\@[^\.][A-Za-z0-9_\-\.]+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.info)|(\.biz)|(\.us)|(\.bizz)|(\.coop)|(\..{2,2}))[ ]*$/gi);

    if (goodEmail!=-1) 
    {
        return true;
    }
    else 
    {
        alert("E-mail address is invalid! Please correct.");
        field.focus();
        field.select();
        return false;
    }
}