The if ... else if Statement

The if ... else if works just like if, but it groups a number of conditions together. The keyword if initiates the group; else if indicates that it belongs to the preceding if or else if. If there is no if preceding one or more else if conditions, the JavaScript interpreter will return an error.

If an expression evaluates to true in any of the conditional statements, the corresponding code statement will be executed and the conditional block exited. Any subsequent else if statements are ignored.

Example

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The Function Code

<script type="text/javascript">
<!--
    function checkOptions(selectedValue)
    {
      //alert(selectedValue);

      if (selectedValue == 1)
      {
        document.write("Checking option 1");
        document.write("1 = 1\nFound match.");
      }
      else if (selectedValue == 2)
      {
        document.write("Checking option 2");
        document.write("2 = 2\nFound match.");
      }
      else if (selectedValue == 3)
      {
        document.write("Checking option 3");
        document.write("3 = 3\nFound match.");
      }
      document.close();
    }
//-->
</script>