JavaScript Tutorial/Development/debug

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Use alert dialog as a way to debug

   <source lang="javascript">

<html> <head> <title>Debug Example</title> <script type="text/javascript"> function myfunction() {

   alert("Entering function.");
   var iNumber1 = 5;
   var iNumber2 = 10;
   alert("Before calculation.");
   var iResult = iNumber1 + iNumber2;
   alert("After calculation.");

} myfunction();

</script> </head> <body> </body> </html></source>


Write some messages to the Java console

   <source lang="javascript">

<html> <head> <title>Debug Example</title> <script type="text/javascript"> function test_function() {

   java.lang.System.out.println("Entering function.");
   var iNumber1 = 5;
   var iNumber2 = 10;
   java.lang.System.out.println("Before calculation.");
   var iResult = iNumber1 + iNumber2;
   java.lang.System.out.println("After calculation.");
   java.lang.System.out.println("Leaving function.");

} test_function();

</script> </head> <body> </body> </html></source>