alert window

[glotsa]

The senerio is "If user has not save the form but click the link to back to the main page, then a window will pop for asking the user whether he likes to save the form or not."

How can i do this? I remember that there is a method to do this like (alert or prompt), right?

[glotsa]

Now, i know that i can use "comfirm("Do you want to save the work?");"
then a window will popup for user to choose "OK" or "Cancel"
how to know that user has clicked the "OK" button and the "Canel" button?

if (clicked "OK"){
//back to main page with saving
}else (clicked "Cancel"){
//back to main page without saving
}

How to code in the if clause??
Pls help:)

[glotsa]

Oh! i can solve the problem. :)
sorry for disturbance.