Chrome扩展程序/根据popup.html中的选择执行不同的内容脚本

I need to do an extension with the following behavior. The popup.html should have two buttons or two radio buttons (button is easier because I don't have to save the selected value like with radio) and depending on the user selection I have to execute one script or another. Also after either of the scripts is loaded and the user wants to use the other one, I have to reload the page in order to "unload" the previous one. Could anyone give me an approach to accomplish this?I need to do an extension with the following be