combobox and POST method

I was wondering how to go to a page the user selected value, using the POST method.

Please check the sample dhtmlxCombo/samples/02_actions/03_combo_save.html

thanks for the reply, I inform you that I took that example to make their own combos, but I also work on putting confirmComboValues ​​() on submit. And 'Internet Exlorer 8 works in other browsers