Question

I have:

if (!myObj.login_id) { 
    alert("The object for login_id does not exist.");
} else {
    alert("The object for login_id DOES exist. The value of the object is: " + myObj.login_id);
}

This is working properly. The object and it’s value are defined already. However, I have multiple objects which are named after their ID attr. So, I try doing this (say for example this is a click event:

objtitle = $(this).attr('id'); // this is "login_id"

if (!myObj.objtitle) {
    alert("The object for "+objtitle+" does not exist.");   
} else {
    alert("The object for "+objtitle+" DOES exist. The value of the object is: " + myObj.objtitle);
}

Why does it stop working when I use a variable for the name of the object?

Answer 1

Use square brackets.

myObj[objtitle]