W3CAPI 实例工具箱
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta charset="UTF-8"> <title>JavaScript Object - watch () method example</title> </head> <body> <h1 style="color: red">JavaScript Object : watch() method</h1> <hr /> <script type="text/javascript"> //This is done to make the following JavaScript code compatible to XHTML. <![CDATA[ o = {x:10} o.watch("x", function (id,oldvalue,newvalue) { document.writeln("o." + id + " changed from " + oldvalue + " to " + newvalue+"<br />") return newvalue }) o.x = 20 o.x = 30 o.x = 40 //]]> </script> </body> </html>
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