I have a URL string in JavaScript below ex-
URL-"/MyProject/Information/EmpDetails.aspx?userId=79874&countryId=875567"
Now, I need to do below 2 things
- Check whether the country exists in above url or not and there will be only one countryId in above url 
- Get the countryId value means 875567. 
Thanks Guys for such good response quickly .I got the solution most of the answers are correct.
One More Question Guys I have hyperlink so i am generating some activities when onmousedown event .but the issue is it fires even when i do right click only..but i want the event which fires only on clicking the hyperlink double click or right click and then click
 
     
     
     
     
     
    