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How to call another function?
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parmenides
Jul 3, 2017, 2:37:15 AM7/3/17
to
Hi all,
I want to call a function from another funciton in the same js file.
For example, in hello.js two functions are defined as follow:
// hello.js
function hello() {
alert("hello");
}
function submit() {
hello();
return true;
}
Then, the submit() function is called in hello.html:
<--! hello.html -->
<html>
<head>
<title>Document</title>
<script src="hello.js"> </script>
</head>
<body>
<form onsubmit="submit()">
<input type="submit" value="submit" />
</form>
</body>
</html>
But, the message box doesn't pop up as expected. If the onsubmit is
replaced as
onsubmit="hello()"
the message box can pop up. It seeems that a function can not call
another function. Is it correct? How can I deal with the problem? Thanks.
I want to call a function from another funciton in the same js file.
For example, in hello.js two functions are defined as follow:
// hello.js
function hello() {
alert("hello");
}
function submit() {
hello();
return true;
}
Then, the submit() function is called in hello.html:
<--! hello.html -->
<html>
<head>
<title>Document</title>
<script src="hello.js"> </script>
</head>
<body>
<form onsubmit="submit()">
<input type="submit" value="submit" />
</form>
</body>
</html>
But, the message box doesn't pop up as expected. If the onsubmit is
replaced as
onsubmit="hello()"
the message box can pop up. It seeems that a function can not call
another function. Is it correct? How can I deal with the problem? Thanks.
Ben Bacarisse
Jul 3, 2017, 7:31:21 AM7/3/17
to
parmenides <xparm...@yahoo.com> writes:
> I want to call a function from another funciton in the same js
> file. For example, in hello.js two functions are defined as follow:
>
> // hello.js
> function hello() {
> alert("hello");
> }
>
> function submit() {
> hello();
> return true;
> }
>
> Then, the submit() function is called in hello.html:
> <--! hello.html -->
(The document should start with a doctype, not a comment!)
> I want to call a function from another funciton in the same js
> file. For example, in hello.js two functions are defined as follow:
>
> // hello.js
> function hello() {
> alert("hello");
> }
>
> function submit() {
> hello();
> return true;
> }
>
> Then, the submit() function is called in hello.html:
> <--! hello.html -->
> <html>
> <head>
> <title>Document</title>
> <script src="hello.js"> </script>
> </head>
> <body>
> <form onsubmit="submit()">
> <input type="submit" value="submit" />
> </form>
> </body>
> </html>
>
> But, the message box doesn't pop up as expected. If the onsubmit is
> replaced as
> onsubmit="hello()"
> the message box can pop up. It seeems that a function can not call
> another function. Is it correct?
call another so something else must be happening. Try this experiment:
rename your submit function submitX in both places and see what happens.
What can you conclude anything from that experiment?
I know I could simply tell you what's happening (and I will if you
want) but surely it's better to learn how to think about these sorts of
thing?
<snip>
--
Ben.
JJ
Jul 3, 2017, 11:18:31 PM7/3/17
to
No return value for onsubmit.
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