function getObject(name)
{
	return document.getElementById(name) ;
}

function getImgObject(name)
{
	return document.getElementById("img_"+name) ;
}

function changeLanguage(lang)
{
	document.location.href='index.html?language='+lang ;
}

function formSubmit()
{
	/* --- DEFINE THAT FORM IS VALID --- */
	var valid = true ;


	/* --- GET FORM ELEMENTS --- */
	form_email = getObject('email') ; img_email = getImgObject('email') ;
	form_name = getObject('name') ; img_name = getImgObject('name') ;
	form_subject = getObject('subject') ; img_subject = getImgObject('subject') ;
	form_bodytext = getObject('bodytext') ; img_bodytext = getImgObject('bodytext') ;
	form_validation = getObject('validation') ; img_validation = getImgObject('validation') ;


	/* --- CHECK EMAIL --- */
	if (!checkEmail(form_email.value))
	{
		valid = false ;
		img_email.src = 'img/ko.gif' ;
		img_email.title = 'You have entered invalid e-mail address!' ;
	}
	else
	{
		img_email.src = 'img/ok.gif' ;
		img_email.title = 'Valid!' ;
	}


	/* --- CHECK NAME --- */
	if (form_name.value.length<3)
	{
		valid = false ;
		img_name.src = 'img/ko.gif' ;
		img_name.title = 'Should be 3 or more chars!' ;
	}
	else
	{
		img_name.src = 'img/ok.gif' ;
		img_name.title = 'Valid!' ;
	}


	/* --- CHECK SUBJECT --- */
	if (form_subject.value.length<3)
	{
		valid = false ;
		img_subject.src = 'img/ko.gif' ;
		img_subject.title = 'Should be 3 or more chars!' ;
	}
	else
	{
		img_subject.src = 'img/ok.gif' ;
		img_subject.title = 'Valid!' ;
	}


	/* --- CHECK BODY TEXT --- */
	if (form_bodytext.value.length<10)
	{
		valid = false ;
		img_bodytext.src = 'img/ko.gif' ;
		img_bodytext.title = 'Should be 10 or more chars!' ;
	}
	else
	{
		img_bodytext.src = 'img/ok.gif' ;
		img_bodytext.title = 'Valid!' ;
	}



	/* --- CHECK VALIDATION --- */
	if (form_validation.value.length!=5)
	{
		valid = false ;
		img_validation.src = 'img/ko.gif' ;
		img_validation.title = 'Should be exactly 5 chars!' ;
	}
	else
	{
		img_validation.src = 'img/white.gif' ;
		img_validation.title = '' ;
	}

	/* --- SEND FORM --- */
	if (valid)
		document.contact_form.submit();
}

function checkEmail(mail)
{
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(mail)){
		return true ;
	}
	return false ;
}