costumizing the 'save' button

I have tried to find a solution to my problem for hours, with no success. This is the issue:

When the user click on the save button, he actualy sends the form.
At the target page, I would like to know if he got there using the save button, or the regular Submit button.
Why ? because if he clicked the save button, I will redirect him back to the editor page, so he can keep on working.
If he clicked the submit button, I will redirect him to the next page.

Thanks,

Ilay

p.s. I have no knowledge using JS, I use classic ASP - VBscript. thanks.