Open modalpopup on click of gridview link button click event

Question

Hell0,
        Am working with C# web application.
I have one gridview with link button in my application.
On click of this link button i want to display all the gridview column details into panel.
This panel should popup on click of link button.I called javascript function on gridview row databound.But in this same panel is opening on click of all gridview rows.
I want to call post back event on click of each gridview link button.
 Please help me..


Regards,
Soumya