Limit selection in Multi-select drop down

[shikhamunjal1989]

I want to limit selection of options in multi select drop down.
But when I am trying to use .length, it is returning the numbers of characters and not the total number of selected fields in the drop down?
Also, the way the selected fields appear is separated by delimiter.
Is there a way to display them as default with a "x" so that it can be removed by clicking on "x"