Use an array to check data

Use an array to check data

I have an array which im using to loop through divs i have stored in
variables... but i want to use the values in the array as part of the
variable names i wish to check.
Heres an example of what im trying to do:
var data_one = document.getElementById('test'),
data_two = document.getElementById('test2'),
array = ['one','two'];
for (var i = 0; i < array.length; i++) {
if(parseInt(data_+array[i]) < 3){
//do something
}
}
But i get this error Uncaught ReferenceError: data_ is not defined
Is there a way to use the array values to act like the variable name some
how?