[AS2] Strings and if statements

I want to have the whole of the argument in an if statement represented by a variable string. Is this possible? I am yet to get the code to work:

var featureLimit:String = "featureType == \"logo_ci4\" || featureType == \"logo_ss2\" || featureType == \"logo_db\"";

//if statement contained in a for loop which gathers the featureType variables
if(featureLimit){
//Do something
}