JavaScript实现回文数判断详解

<html> 
  <head> 
    <meta http-equiv="Content-Type" content="text/html;charset=gb2312"/> 
    <title>test</title> 
    <script type="text/javascript"> 
      var number = parseInt(window.prompt("输入回文数")); 
      if(daozhi(number) == number) { 
        document.writeln(number + "是回文数"); 
      } else { 
        document.writeln(number + "不是回文数");  
      } 
       
      /*整数的倒置*/ 
      function daozhi(num) { 
        var newNumber = 0; 
         
        while(num != 0) { 
          newNumber *= 10; 
          newNumber =newNumber + (num % 10); 
          num = Math.floor(num/10); 
        } 
         
        return newNumber; 
      } 
       
    </script> 
  </head> 
  <body> 
  </body> 
</html>