jquery: test whether input variable is dom element

Question

I would like to write a jquery function that accepts either a dom element or its id as input:

function myfunction(myinput){
 // pseudocode:
 // if (myinput i         


        

Answer 1

You would implement your function like this:

function myfunction(myinput){

 if (myinput.nodeType){
    var myID = $(myinput).attr('id');
 } else {
    var myID = myinput;
 }

 // Do stuff with myID ...

}

More information about nodeType.