Using Variables In "this." Assignments?

Is there any way to use variables inside "this." assignments?

Here is a sample function :
function parse_result(strEntry,strFieldNamesArray)
{
// Associates the values of the results with the field names returned by server.

var strEntryArray = strEntry.split('|');

for (var i = 0; i < strFieldNamesArray.length-1; i++)
{

this.strFieldNamesArray[0] = strEntryArray[i];

}}

strFieldNamesArray[0] might contain "PAIR".
strFieldNamesArray[1] might contain "NI".

What is need is to programatically create something like :

this.PAIR=Blue
this.NI=235

because strFieldNamesArray might contain lots of different values, I can't hard code the "this." assignments.

However, everytime I try to do this, I get the error "this.strFieldNamesArray has no properties". I've even tried to create a variable to store the values of strFieldNamesArray[0] and use it in the "this." assignment, but that doesn't work either.

Does anyone know a way to do this?