[Tfp]

var a:Number = 2;
var b:int = 2;
function checkInt(obj:Object,i:String) {
	var old = obj[i];
	obj[i]+=.1;
	if (old==obj[i]) {
		trace("=)");
	} else {
		obj[i]=old;
		trace("=(");
	}
}

checkInt(this,'a');// =(
checkInt(this,'b');// =)
trace(b);//2
trace(a);//2