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Calling a function based on the value of a JS variable

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Oct 06.2008

Hello all,

I’m creating a JS that needs to call a function, but the name of this function is variable. I have instantiated a JS class that stores the name of the function that needs to be called to a variable. I now wish to call this function but Im unsure how to do this.

code snippet:

var returnfunc // The name of the function that needs to be called

trying to run the function like:

returnfunc(activeRow.cells[0].innerHTML, activeRow.cells[1].innerHTML, activeRow.cells[2].innerHTML);

but failing miserably. I know that the variable is correct since I used:
alert(returnfunc); right befor the attemp to call the function and the variable name is properly set.

Any help on how to call a function based on a variable’s name would be greatly appreciated.

Rob

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JavaScript

6 Comments(s) ↴

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@toicontienOct 06.2008 — Is [B]returnfunc[/B] a function object or a string? They way you are using it, returnfunc should be a function object. Just before you call returnfunc, insert this line of code:
alert( typeof(returnfunc) );
It should alert "function". If it doesn't, that's your problem.
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@rnd_meOct 06.2008 — if the variable points to a global function:

[CODE]
window[returnfunc](activeRow.cells[0].innerHTML, activeRow.cells[1].innerHTML, activeRow.cells[2].innerHTML);[/CODE]
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@DokOct 06.2008 — If f is a function you can assign it to a and call it with
[CODE]
function f() {
}

a = f;

a();
[/CODE]
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@binro01authorOct 07.2008 — Thanks all. It looks like the variable is coming in as a type string. How do I pass to the javascript the value of returnfunc as a type function so that I can use your suggestions?
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@rnd_meOct 07.2008 — Thanks all. It looks like the variable is coming in as a type string. How do I pass to the javascript the value of returnfunc as a type function so that I can use your suggestions?[/QUOTE]

yay, that was my guess, i win!

i showed you how to use a string to invoke a ref to a function in the past post.

is your function not a global?
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@DokOct 07.2008 — How do I pass to the javascript the value of returnfunc as a type function so that I can use your suggestions?[/QUOTE]
Instead of
[CODE]return 'myFunction';[/CODE]
do
[CODE]return myFunction;[/CODE]
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