instr is indexOf in javascript
Is there any equivalent of instr of VBscript in javascript, yes there is, its called indexOf
object.indexOf (string);
this will give you position of string in the object indexed from 0. examples -
var foo="ideamonk";
document.writeln (foo.indexOf("idea"));
document.writeln (foo.indexOf("monk"));
document.writeln (foo.indexOf("nothing"));
the output is likely to be -
0
4
-1
Labels: javascript
posted by Abhishek Mishra @ Friday, June 27, 2008
6 Comments
6 Comments:
Hey thanks, this was really useful.
It looks like you are you mixing quotation marks around your search term. Is that right?
@Prairie: woops... thanks a lot... I've changed the code now. That really slipped my eyes...
# document.writeln (foo.indexOf('idea"));
becomes
# document.writeln (foo.indexOf("idea"));
Cheers!
Hey, I try to change
var foo="ideamonk";
to
var foo=document.getElementById('myText');
but it kills the script, why's that?
Here's what's happening, document.getElementById would return you a DOM node, if exists. Which would be of the type Object in javascript. Whereas indexOf, in javascript, exists in the prototype of String types. Which is why it wouldn't work for an object.
Now, I suppose you're trying to make indexOf work on contents of an element, whose id is known. If that's the case, you could try it this way -
var foo = document.getElementById('myText').innerHTML;
If you use jquery, things would be even more easier -
var foo = $("#myText").html();
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