need help with regex in javascript to replace string pattern
<p>Need help with regex javascript , i tried few but didn't work</p>

<p>i want to replace the the following string which is a url. The values <strong>200, 400</strong>  are dynamic in the below string</p>

<p><code>url=http://www.test.com?debug=true&amp;MAXWIDTH:200+MAXHEIGHT:400</code></p>

<p>with ,900 , 900 always and the result should be </p>

<p>after regex i want the url string contains the below value</p>

<pre><code>url=http://www.test.com/?debug=true&amp;MAXWIDTH:900+MAXHEIGHT:900
</code></pre>
