Action script

1

I can’t seem to fix this erorr
can anyone tell me whats wrong’
Heres the erorr:

**Error** Scene=Scene 1, layer=buttons, frame=57:Line 1: Statement must appear within on handler
     {btn_Up.onRelease = function() {

Total ActionScript Errors: 1      Reported Errors: 1

Heres the code

{btn_Up.onRelease = function() {
    getURL("'http://'abe.geistig.net/index.swf'")
}
}