jQuery - use variable as function name

Question

In Jquery i'd like to disable any plugin I want by changing a variable name. However the following code doesnt work

function disablePlugin(functionName) {
    $('#divID').functionName('disable')
}

disablePlugin('sortable');

any ideas about how I manage to do this?

Answer 1

This is how you would do that:

function disablePlugin(functionName) {
  $('#divID')[functionName]('disable')
}

disablePlugin('sortable');

This works because someObject.foo is the same thing as someObject['foo']

Answer 2

To invoke the function passed in as a string, you could do

function disablePlugin(functionName) {
    $('#divID')[functionName]('disable')
}

disablePlugin('sortable');