URL Button to check a checkbox

I am trying to use a button to check  a checkbox.  The page refreshes but the checkbox is ever checked.  Any idea what could be causing this?  Any help would be appreciated.  Thanks

var text URL =
URLRoot() & "db/" & Dbid () & "?act=API_EditRecord&rid=" & [Record ID#]
& "&_fid_45=1";

"javascript:" &
"$.get('" &
$URL &
"',function(){" &
"location.reload(true);" &
"});" & "void(0);"

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Jason Beaver
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