Frames

Another way to test on the desktop is to create a Web page with an inline frameset or iframe, specify the dimensions to match your target mobile screen and add the URL of your mobile site like the following example:
<iframe src ="mobile/index.html" width="240" height="320" style="border:1px solid;"> </iframe>These steps create a reasonable representation of a mobile device on the desktop. You can even go as far as to wrap the frame with an image of a phone for further realism.