How to store value into sessionafter refresh the page?

Question

Hello,

I am store the value into session using the java script. But when i refreshing the page session is every time null("").

var strPath="1234:10000;1357:007;";

'<%Session["OldValues"] = "' + strPath +'"; %>' ;

var temp= '<%= Session["OldValues"] + ""%>';

So, how to store the value into session after refreshing the page using javascript.

Thanks & Regards,

Brijesh Mandaliya