Is there a way to add a button to a record that will cause a change to be made to the record when clicked?

I am now getting this error,

Formula syntax error

A variable declaration must end with a semi-colon.



var text URL = URLRoot() & "db/" & dbid()   "?act=API_EditRecord&_fid_9=1&rid=" & [Record ID#];

 "javascript:" &
 "$.get('" &
 $url &
 "',function(){" &
 "$.jGrowl('This Task has been completed', {life: 5000, theme: 'jGrowl-green'});" &
 "});" &
 "void(0);"