"invalid break" error troubleshooting

I have a JavaScript code that combines specific versions of forms based upon a set of user-specified state abbreviations. The validation function runs just fine, returning "false" if the type of compilation is not appropriate for one or more states. I want to alert the user that state(s) in the list is not appropriate, and stop the entire script following the user-clicked "OK". When I run the script from the console, it throws an "invalid break" error. Here is the offending set of code:

var aListOfStates = new Array();
	if (targetStates == "ALL") {
		aListOfStates = aAllStates;
		targetStates = aAllStates.join(",");
	}
	else {
		var noMatch = "";
		aListOfStates = targetStates.split(",");
 
		for (i = 0; i<aListOfStates.length; i++) {
			if (aAllStates.exists(aListOfStates[i]) == false) {
				noMatch += aListOfStates[i] + ",";
			}
		}
 
		if (noMatch != "") {
			app.alert("These states are not eligible for creating life application packets: " + noMatch);
			break;
 
		}
	}

(I apologize in advance if the formatting is poor: this is the first time I've added code to a message in this forum.)

In lieu of rewriting this, is there something I'm totally missing about using a break here?

Thanks for any suggestions and comments!