/**************************************************************************************
This function's purpose is to insure the value of an input tag is all numbers

 Name:       Check_number_only(obj)
 Input:      obj - source field
 Returns:    nothing
 Notes:
 Mod history:
**************************************************************************************/



function Check_number_only(obj)
		{
		   var string = obj.value;
		   var re = new RegExp("[^0-9]");
		   var isin = re.test(string);
		   	   if (isin)
					{
					alert("No Letters nor Special Characters Allowed : -- ; ' & ! # % ");
					obj.value = '';
					obj.focus();
					
					}
				else
					return true;
		}