Is there any ability to add scroll bar function to css3 radio buttons?

Q: Is there any ability to add scroll bar function to drop down menu?
We have over 50 items (Cities) that we like to have added into drop down menu, but without scroll bar it appears monstrous and difficult to use.

Please, support with piece of code and description where it should be added.

Thank you in advance!

A: You can do it in the following way. Open the generated .css file in any text editor.
Find the following code:

...
ul#css3menu_top ul {
    background-color: #424542;
    border-color: #FFFFFF;
    border-radius: 6px 6px 6px 6px;
    border-width: 2px;
    box-shadow: 3.5px 3.5px 5px #000000;
    display: none;
    height: 300px;
    left: 0;
    padding: 0 10px 10px;
    position: absolute;
    top: 100%;

}
...



Add width and overflow parameters like this:

...
ul#css3menu_top ul {
    background-color: #424542;
    border-color: #FFFFFF;
    border-radius: 6px 6px 6px 6px;
    border-width: 2px;
    box-shadow: 3.5px 3.5px 5px #000000;
    display: none;
    height: 300px;
    left: 0;
    overflow: auto;
    padding: 0 10px 10px;
    position: absolute;
    top: 100%;
    width: 160px;
}
...


Notice, that it's possible to add the scroll bar into drop down menu if there is no
other submenus in it.

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