function chech_con()
{
	temp=document.contact_us.name.value;
	temp3=document.contact_us.comments.value;
	if(temp=="")
	{
		window.alert("Username field could not be left blank.");
		document.contact_us.name.focus();
		return false;
	}
	if(temp3=="")
	{
		window.alert("Please write here some few word.")
		document.contact_us.comments.focus();
		return false;
	}
	if(!isValidemailc())
		return false;
	document.contact_us.submit();
}
function isValidemailc()
	{
		var email = contact_us.email.value
		if(email == "")
		{
			alert("Please enter a Email address.");
			document.contact_us.email.focus();
			return false;
		}
			if ( (email != "") && ((document.contact_us.email.value.indexOf("@")==-1) ||(document.contact_us.email.value.indexOf(".")==-1)))
			{
				alert	("Please enter a valid Email address.");
				window.contact_us.email.focus();
				return false;
			}
		return true;
}