how to pass an variable from Titanium app.js to webview html

how to pass app.js variable to webview html property?

I'm test marquee effect in webview.

I pass a app.js variable to webview html code.

I use this manner, but It is show wrong code about '" .

Am I have to use evalJS reach purpose?

thank you very much.

var myTxtVariable =" test marquee......";
var marquee = Ti.UI.createWebView({
        width : Regis.screenContentWidth,
        height : 40,
        left : 0,
        bottom : 0,
        html:"<marquee  scrollamount=2 >'"myTxtVariable"'</marquee>",
        backgroundColor : "ccc"
    });
win.add(marquee);