Exception Handling in Velocity Template

[Jitendra Rajput, geändert vor 11 Jahren.]

I am using code inside my velocity template which can throw JS error if user dont have permission.
I want to perform exception handling with velocity code. Below is the example code.

#if($legacy-QA-URL.getData() && $legacy-QA-URL.getData() != "" && !($legacy-QA-URL.getData().contains("#")))
	<p><iframe src="$legacy-QA-URL.getData()&amp;lruserid=$user_ScreenName" style="display: none"></iframe></p>
#else
	#if($legacy-PROD-URL.getData() &amp;&amp; $legacy-PROD-URL.getData() != "" &amp;&amp; !($legacy-PROD-URL.getData().contains("#")))
		<p><iframe src="$legacy-PROD-URL.getData()&amp;lruserid=$user_ScreenName" style="display: none"></iframe></p>	
	#end
#end

Any pointer will be really helpful.

- Jitendra