Scripting Support in Internet Explorer Mobile
Missing objects, syntax errors in JScript, or other causes of JScript errors are ignored by Internet Explorer Mobile . Instead of sending an error message to the user, the script stops without sending an error message. You can switch error messages on by adding the following registry key to the registry:
The DOM reference can be found at the topics under Internet Explorer Mobile HTML Scripting Objects.
For documentation on the JScript engine that is included in Internet Explorer Mobile , see the Jscript documentation on MSDN.