Javascript String LastIndexOf() Function

The lastIndexOf() function of string object returns the index of the last occurrence of the specified substring, or -1 if not found. The indexOf() function is case sensitive. Use it for example to search substring (desending order) within string object.

Syntax

str.lastIndexOf(searchValue[, fromIndex])

Javascript String LastIndexOf() Function Example

<DOCTYPE html>
<html> 
<head> <!-- www.techstrikers.com -->
<script type="text/javascript">
var str = "WWW.techstrikers.COM, www.techstrikers.com";
document.write(str.lastIndexOf('COM'));
document.write(str.lastIndexOf('com'));
document.write(str.lastIndexOf('in'));
</script>
</head>
<body>
</body>
</html>

See Live Example

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