JavaScript Reference/Javascript Methods/indexOf

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"indexOf()" Example

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<html> <body> <button onclick="var myS = new String("Sample String"); alert(myS.indexOf("String"));"> call string indexOf method </button> </body> </html> 


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"indexOf()" is applied to

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+----------------+--------------------------------------------------------------+ | Applied_To |String | +----------------+--------------------------------------------------------------+ 

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"indexOf()" Syntax, Parameters and Note

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Note: This method performs a search for the specified string and returns the character number in the string at which the match starts. If no match is found, it returns -1.

Syntax:

stringName.indexOf(param1, param2) Parameters: 

   param1   Required; the string to search for.
   param2   Optional; the character number in the string at which to start the search.
   
     
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Источник — «http://wbex.ru/index.php?title=JavaScript_Reference/Javascript_Methods/indexOf&oldid=7783»