javascript, jQuery convert PHP string to number

Working with PHP data inside javascript.
Echo or passing a php number in javascript may turn it to be string instead of integer.

<input type="text" onchange="math( '<?php echo '1';?>' )">

<script type="text/javascript">
  function math( number ){
	//here the number will be string
	//to be able to process the string as number, use parseInt
	var no = parseInt(number);

By Keenlio, May 9, 2014

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