How to save clicked value in session using jquery

Question

when i click tree view node am getting id by giving alert

 

$('.treeview a').on('click', function () {

alert(this.id);

});

 

but how to save that id session , i want to use in controller 

 i have tried this

 

$('.treeview a').on('click', function () {

@Session["id"]=this.id;

});

 

but am not getting value