What is the best way to use context-param in JavaScript

In my web.xml I set context param "pathToImages". In my jsp files to get path to my i开发者_如何学Gomages files I use EL, like this:

<img src="${initParam.pathToImages}"/image.jpg" />

But I have problem with JavaScript. In my js files I have code:

setInnerHTML("somePlace", "<.img src='images/s.gif'>");

I know this isn't beautiful code but it isn't mine :) I cannot get my pathToImages in the same way like from jsp. What is the best way to do this?

Pass it as parameter to the js function: function createImage(path) {..} and invoke it with createImage('${initParam.pathToImages}')

Another, perhaps a better option is to have a js variable and initialize it with the desired value. In the JS file:

var imagePath;

function init(config) {
    imagePath = config.imagePath;
}

and in your header:

init({imagePath: '${initparam.pathToImages}'});

If you are using templates to build your pages (i.e., tiles or velocity templates) you could assign the variable in your base template with a scriptlet, like:

<script> var imagePath = '<%= config.getServletContext().getInitParameter("pathToImages") %>'; </script>

Then you can refer to the imagePath variable in your js files.

Not pretty, but I don't believe there is a way to access the servlet context from a javascript file directly.