databinding

Hii...there..

         i have two  .aspx forms.On Form1.aspx i have a textbox named customername and a button Click.On clickin tat  button my second form Form2.aspx opens which has  also contained  a textbox  named Customername and a button submit.  Now wen i enter Customername in on form2.aspx textbox i wanna bind tat textbox value on Form1.aspx textbox.

             may i knw hw do i fix this problem..??

thanks.
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