var send_value = "N";
//-txt_name,txt_phone,txt_street,txt_city
//,state,txt_city,txt_zip,-submit_by,comments,hear_about_us
function check() 
{
		var str = frm.submit_by.value;
		for (var i=0;i<str.length;i++){
			if (str.substring(i+1,i+2)=='@'){
				var str_1='y';
			}
			if (str_1=='y' && str.substring(i,i+1)=='.') {
				return true;  //mail right
			}
		}
		return false;	//mail wrong	
}
	
function mail_send()
{
//txt_name,txt_mail  --Çʼö ÀÔ·Â
//txt_tel,txt_company,txt_site,txt_text
if(send_value == "N")
{
	if(!frm.txt_name.value )
		{ alert("Please make sure all fields marked with * are completely filled out");
			frm.txt_name.focus(); return;}
	if(!frm.submit_by.value)
		{ alert("Please make sure all fields marked with * are completely filled out");
			frm.submit_by.focus(); return;}
	else
		{
			if(!check())	//mail wrong
			{
				alert("Please make sure your Email Address is entered in this format. (eg. myname@company.com).");
				frm.submit_by.focus(); frm.submit_by.select();	
				return false;
			}
		}		
	frm.action = "mail_send.php";
	frm.submit(); 
	send_value = "Y";
}

} //mail_send()>