function sybmitForm() {
    //	alert(document.contactUs.sender_fname.value);
    if (document.contactUs.sender_fname.value == '') {
        alert("Please enter first name");
        document.contactUs.sender_fname.focus();
        return false;
    }
    if (document.contactUs.sender_lname.value == '') {
        alert("Please enter last name");
        document.contactUs.sender_lname.focus();
        return false;
    }
    if (document.contactUs.sender_comp_name.value == '') {
        alert("Please enter company name");
        document.contactUs.sender_comp_name.focus();
        return false;
    }
    if (document.contactUs.sender_email.value == '') {
        alert("Please enter email address");
        document.contactUs.sender_email.focus();
        return false;
    }
    else if (!isEmail(document.contactUs.sender_email.value)) {
        alert("Please enter valid email address");
        document.contactUs.sender_email.focus();
        return false;
    }
    /*	if(document.contactUs.enquiry.value == '')
    {
    alert("Please enter question or comment");
    document.contactUs.enquiry.focus();
    return false;
    }*/
    if (document.contactUs.sender_phone.value == '') {
        alert("Please enter telephone number");
        document.contactUs.sender_phone.focus();
        return false;
    }
    else if (!hasOnlyNumericwithSpace(document.contactUs.sender_phone.value)) {
        alert("Please enter valid telephone number");
        document.contactUs.sender_phone.value = '';
        document.contactUs.sender_phone.focus();
        return false;
    }
    if (document.contactUs.sender_add.value == '') {
        alert("Please enter address");
        document.contactUs.sender_add.focus();
        return false;
    }
    if (document.contactUs.sender_pstcode.value == '') {
        alert("Please enter post code");
        document.contactUs.sender_pstcode.focus();
        return false;
    }
    document.contactUs.submit();
}