Can I write a var from the ASP and have access to him later?

Question

I wrote the this code in a ASP form: Response.Write(""); This code writes a var called my_var to the HTML code. When the form is running the value of my_var is updating. After updating his value I want to be able to get to my_var from the ASP form. How can I get to the var my_var from the ASP form?