in reply to
What code have you got so far?
Please post what you have got and any error messages, so we are able to see where the problem is.
You might want to look at Writeup Formatting Tips before you post code.
Priority 1, Priority 2, Priority 3
Priority 1, Priority 0, Priority -1
Urgent, important, favour
Data loss, bug, enhancement
Out of scope, out of budget, out of line
Family, friends, work
Impossible, inconceivable, implemented
Results (279 votes),