Passing html from AS3 to Javascript

I am using WebStageView to pass html from AS3 to a Javascript function in a webpage.

I do this like:

var urltext:String = "javascript:setText('aaa','vvv')"

webView.loadURL(urltext);

This successfully calls a function in JS named setText  which in turn sets the value of a div  or whatever else I want to do.

Here is the problem:

If I want to pass:

var urltext:String = "javascript:setText('<p>aaa</p>','vvv')"    the formatted text works fine and I get no errors  however,

if I pass it like this:  

var txt:String = '<p>aaa</p>';

var urltext:String = ""javascript:setText('+txt+','vvv')"       then I get a parse error;

It traces out to look like this:

urltext: javascript:setText('<p>aaaaa</p>

','vvv')

Notice that there is a return after the   </p>     which is apparently causing the parse error.

I am loading text from a file and passing it via the above call to JS.

In short, is there a way to format the text so it doies not cause the parse error?

Or, is there a better way to pass html strings in a call to Javascript?

ExternalInterface does not seem to work anymore  and I am avoiding WebStageViewBridge.