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JavaScript indexOf() Method
 Complete String Object Reference
Definition and Usage
The indexOf() method returns the position of the first occurrence of a specified string
value in
a string.
Syntax
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stringObject.indexOf(searchvalue,fromindex)
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| Parameter |
Description |
| searchvalue |
Required. Specifies a string value to search for |
| fromindex |
Optional. Specifies where to start the search |
Tips and Notes
Note: The indexOf() method is case sensitive!
Note: This method returns -1 if the string value to search for never
occurs.
Example
In this example we will do different searches within a "Hello world!" string:
<script type="text/javascript">
var str="Hello world!";
document.write(str.indexOf("Hello") + "<br />");
document.write(str.indexOf("World") + "<br />");
document.write(str.indexOf("world"));
</script>
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The output of the code above will be:
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Complete String Object Reference
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