function Check(){
if (document.form.Name.value=="" || 
    document.form.Email.value=="" ||
    document.form.Comment.value=="")
		{
	window.alert("Please, write your e-mail, name\nand message. ");
	return false;}
else return true;}

function Check1(form){
if (document.form.Name.value=="" || 
    document.form.Message.value=="")
		{
	window.alert("Please fill all required fields \nmarked out bold.");
	return false;}
else return true;}

function Check2(form){
if (document.form.Email.value=="" || 
    document.form.Name.value=="" ||
    document.form.Phone.value=="" ||
	document.form.Prod.value=="" ||
	document.form.Amount.value=="" ||
	document.form.Paper.value=="" ||
	document.form.Srok.value=="" ||	
	document.form.Message.value=="")
		{
	window.alert("Please fill all required fields \nmarked out bold.");
	return false;}
else return true;}

function Check3(){
if (document.form.Comment.value=="" ||
	document.form.Email.value=="")
		{
	window.alert("Please write your e-mail and message.");
	return false;}
else return true;}

function Check4(form){
if (document.form.Name.value=="" || 
    document.form.Email.value=="")
		{
	window.alert("Please write your name and e-mail.");
	return false;}
else return true;}

function Checks(form){
if (document.form.an1.value=="" || 
    document.form.an2.value=="" ||
	document.form.an3.value=="" ||
	document.form.an4.value=="" ||
    document.form.an5.value=="" ||
	document.form.an7.value=="" ||
	document.form.an8.value=="")
		{
	window.alert("Please fill all required fields \nmarked out bold.");
	return false;}
else return true;}