function sendemail_leftnav_contact_us_form_submit(form_obj) { /* need all to be localize both of contactform form name & specific variable names for each usage*/

	var http_contactform = createRequestObject();

	function createRequestObject() {
    	var ro;
    	var browser = navigator.appName;
    	if(browser == "Microsoft Internet Explorer"){
        	ro = new ActiveXObject("Microsoft.XMLHTTP");
    	}else{
        	ro = new XMLHttpRequest();
    	}
    	return ro;
	}

	function handleResponse() 
	{
		if(http_contactform.readyState == 4)
		{
			document.getElementById('leftnav_contact_us_form_div').innerHTML='<strong>Message Sent!</strong>';
			HideBanner();
		}
	}
	

	var full_name = form_obj.contact_us_leftnav_full_name.value;	
	if(english_letters(full_name)==false || validate_contact_us_leftnav_full_name()==false)
	{
		alert('Please enter validate full name');
		return false;
	}

	var email_address = form_obj.contact_us_leftnav_email.value;
	if(validate_email(email_address)==false || validate_contact_us_leftnav_email()==false)
	{
		alert('Please enter validate email');
		return false;
	}
	
	var phone_number = form_obj.contact_us_leftnav_phone.value;
	if(english_letters(phone_number)==false || validate_contact_us_leftnav_phone()==false)
	{
		alert('Please enter validate phone');
		return false;
	}
	
	var comments = form_obj.contact_us_leftnav_message.value;
	if(comments=='undefined' || validate_contact_us_leftnav_message()==false)
	{
		alert('Please enter validate message');
		return false;
	}
	
	http_contactform.open('get', '/http_contactform/leftnav_contact_us_form/http_contactform.php?full_name='+full_name+'&email_address='+email_address+'&phone_number='+phone_number+'&comments='+comments+'&action=send');
	http_contactform.onreadystatechange = handleResponse;
	http_contactform.send(null);	
	
	return true;
}