javacript with a gridview

I have got a simple gridview two bound columns and one template column with a textbox.
I need to get the values of the bound columns is this possible. I need to times the textbox with the bound column value
Now i can get the textbox value using
// var sumInput = null;
// var tempValue = 0.0;
// var retail = 0.0;
// function Load(sender, args) {
// sumInput = sender;
// }
// function Blur(sender, args) {
// sumInput.set_value(tempValue + (sender.get_value()));
// }
// function Focus(sender, args) {
// tempValue = sumInput.get_value() - (sender.get_value());
// }
 
 
 
 




But
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