How to display the Asynchronous results which one is first in asp.netweb application?

I have to send three asynch requests in three class files, 3 requests response times are different, first one is 2sec and second one is 7sec and third one is 4sec , now i have to display first response in browser with in 2sec and after 2sec display the third response and finally display the second response , but now my results all responses display at a time after completed three responses, please give me any suggestion, it is very urgent, please…..

how to use the img tag

i am a student working in an simple application and i do not know how to use the img tag and i have tryed one such code but while executing the code the image is not showing plz see the code and help me to saw what is the wrong in the code.