Hello Friends.
The java script code provided by the whos.amung.us is not supported by wordpress platform. We need to change Java Script Code into Html Code for wordpress Platform. Don’t worry I will tell you the method step by step.
1. Create an account on whos.amung.us and copy the below rectangle code
(ex. 4qqm7c4tek1m).
2. logged into wordpress, select ‘My Dashboard’ from the top bar.
3. In the dashboard select the ‘Design’ tab, then select the ‘Widgets’ option.
4. From the ‘Available Widgets’ column on the left side of the page, Drag n Drop the ‘Text’ widget to right sidebar.
5. Click the ‘Edit’ link in the new ‘Text’ widget. The editing box will appear.
6. After open the editing box, enter any title name for your widget and in the larger box enter the widget code given below.and replace the red Code to your own code which you get from step 1. After finished press the ‘Save’ button.
<a href="http://whos.amung.us/stats/4qqm7c4tek1m/"><img src="http://whos.amung.us/widget/4qqm7c4tek1m.png" width="81" height="29"border="0" title="click to see how many people are online"/></a>
Hope this method work for you. If you face any problem then comment below.

thanks now i can add whos amung widget
hey I tried but I failed. can you help me?