How To Set A JS object property name from a variable

I am in need to set a JS object property name dynamically.

for(i=1; i<3; i++) {
    var key  = i+'name';

    data = {
        key : 'name1',
    }
}

Result should be:

data = {
    1name: 'name1'
    2name: 'name1'
}