Javascript function not working in asp.net

Use

onclick = 'window.location="MyPage.aspx"'

This will not work for me as i have for ex in MyPage.aspx has 2 panels and i am making only 1 panel visible at a time. if i use window.location it will ofcourse redirect to that page but i will not be able to view the panel which i want since at page load i am making only 1 panel visible

You can use Sessions to store values of whether Panel1 should be shown or Panel2.

Histort.back() will redirect to the current page if current page has done a postback. So there is no solution for that

U mean instead of history.go(-1) i must write history.back()?

Suppose there are 2 postbacks then (-1) will not work but (-2) needs to be used

Thus there's no solution for this as you will never know how many postbacks