Creating a function in javascript is very simple but calling / invoking the function sometime gets tricky when a function don’t have a parameters, and wondering why the function is it not working….
Example:
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function countBodyChildren() {
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var body_element = document.getElementsByTagName("body")[0];
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alert(body_element.childNodes.length);
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}
and you invoke the function like this
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window.onload = countBodyChildren();
when you run your program, nothing happens. So, what’s the problem?
In javascript, calling function without parameter should not have an open and close parenthesis, that’s all folk….:)
It should be
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window.onload = countBodyChildren;