Identify if Form Load after save

When saving a record in dynamics crm 2011 the form will load again and will trigger the javascript Onload function.

I have the following functionality:

when the user opens the form manually, i have to call a function when the form loads, however when the records is saved and the form is automatically reloaded this function should not be called again.

Is there a way to determine if the form loading is after manual user opening or after save.