function testContactForm()
{
	if (document.form1.set_name.value == '')
	{
		alert(alrt_cr_name_missing);
		document.form1.set_name.focus();
		return false;
	}
	
	if (document.form1.set_surname.value == '')
	{
		alert(alrt_cr_surname_missing);
		document.form1.set_surname.focus();
		return false;
	}
	
	if (document.form1.set_email.value == '')
	{
		alert(alrt_cr_email_missing);
		document.form1.set_email.focus();
		return false;
	}
	
	if (document.form1.set_phone.value == '')
	{
		alert(alrt_cr_phone_missing);
		document.form1.set_phone.focus();
		return false;
	}
	
	return true;
}

function isNumber(sText)
{
  var ValidChars = '0123456789';
  var Char;
  var dotCnt = 0;
	
	if (sText.length < 1) 
		return false;

  for (i = 0; i < sText.length; i++)
  {
	  Char = sText.charAt(i);
	  
	  if (Char == '.') 
	  {
	  	if (dotCnt > 0)
	  		return false;
	  	if (i < sText.length-3)
	  		return false;
	  	
	  	dotCnt = dotCnt+1;
	  } else
	  if (ValidChars.indexOf(Char) == -1)
	  {
		  return false;
		}
  }
	
	return true;
}

function testDotpayForm()
{
	if (!isNumber(document.form1.amount.value))
	{
		alert(alrt_dp_amount_invalid);
		document.form1.amount.focus();
		return false;
	}
	
	return true;
}