function IsNumeric(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
   }

function validateNumber(fld) {
	if (!IsNumeric(fld)) {
		alert("Please enter a valid number from 1 to 999");
		return false;
	}
	if ((fld+0) < 1) {
	  alert("Please enter a valid number from 1 to 999");
		return false;
	}
	return true;
}

function validateForm(frm) {
	
	if (!frm.pounds) return false;
	
  if (!validateNumber(frm.pounds.value)) {
		return false;
	}
	
	frm.submit();
	return true;

}