Hi Mani,
> [...] front end validations like Pop ups and alert box, Will it be handled in WebLoadUI [...] ?
WebLoadUI is designed to load test web servers (from the end-user point of view), but not the functionality of the tested application on the end-user side.
This means, that basically, WebLoadUI operates in non-attended mode. I.e. it sends requests to the web server and compares obtained responses with the expected ones.
Obtained responses are not processed by the web browser and thus no validations, css filtering/formatting, data input, etc. are taking place at the front-end.
If you need to function-test your application (i.e. check if alert is displayed in response to some user input and whether client script requires some field to be populated with data before submitting request to the server and so on), then you should consider the tool that is oriented on the functional testing of web applications.
TestComplete (
http://smartbear.com/products/qa-tools/automated-testing-tools) is a great example of such a tool and really worth trying.
