Create associative array using vars

Hi

Just wondering if anyone knows how to create an associative array but using variables. eg

expertArray.push( { Index: 0, Name: “My name” } )

where ‘Name’ could be a variable as I am doing a translation of an existing application, for example:

var_name:String = “nom”;
expertArray.push( { Index: 0, var_name: “My name” } )

this takes the literal meaning, so this example does not work.

Any ideas?