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How do you check to see if a javascript function exits?

i tried checking for document.function_name(), but that apparantly does
not work. Anybody got an answer to this one?

Apr 19 '06 #1
2 1382
Ivo
<al*********@gmail.com> wrote
i tried checking for document.function_name(), but that apparantly does
not work. Anybody got an answer to this one?


Using the typeof operator seems to be the simplest way:

if( typeof function_name === 'function' ) {
// function exists, so let's use it
}

hth
ivo
http://4umi.com/web/javascript/
Apr 19 '06 #2
thanks, tried it and it works like a charm

May 2 '06 #3

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