Perhatian 
Copy skrip atau download.
<!-- TWO STEPS TO INSTALL ALERT: 

  1. Paste the coding into the HEAD of your HTML document 
  2. Add the last code into the BODY of your HTML document --> 

  <!-- STEP ONE: Copy this code into the HEAD of your HTML document --> 

  <HEAD> 

  <SCRIPT LANGUAGE="JavaScript"> 

  <!-- This script and many more are available free online at --> 
  <!-- The JavaScript Source!! http://javascript.internet.com --> 

  <!-- Begin 
  function drawAlert () { 
  alert ("This is an alert message that can say whatever you want!"); 
  } 
  // End --> 
  </SCRIPT> 

  <!-- STEP TWO: Put this code into the BODY of your HTML document --> 

  <BODY> 

  <CENTER> 
  <FORM> 
  <input type=button value="JavaScript Alert! Click Here!" onClick="drawAlert()"> 
  </FORM> 
  </CENTER> 

  <!-- Script Size: 0.78 KB --> 
 
 
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