Cancel dragging of a sortable item

Question

An absolutely common sortable case:

  
Item         


        

Answer 1

Returning false as fudgey suggests works great for making things dynamically unsortable, but there's also a cancel option in the sortable config which lets you set up static unsortables as well:

$("#sortable").sortable({
    // this prevents all buttons, form fields, and elemens
    // with the "unsortable" class from being dragged
    cancel: ":input, button, .unsortable"
});