localStorage migration mechanism. please, help me make it better if possible.

gistfile1.js

// -------- Database section
// current version
var __version__ = '1.0.0';
var __versions__ = {
    '1.0.1': migrate_1_0_1,
	'1.0.2': migrate_1_0_2,
	'1.0.3': migrate_1_0_3,
}
function migrate_1_0_1() {
console.log('going into migrate_1_0_1');
}
function migrate_1_0_2() {
console.log('going into migrate_1_0_2');
}
function migrate_1_0_3() {
console.log('going into migrate_1_0_3');
}
function migrate() {
	if (!localStorage.getItem('db:version')) {
		localStorage.setItem('db:version', '1.0.0');
	}
	for (var version in __versions__) {
		var current_version = localStorage.getItem('db:version');
		if (version > current_version) {
			var callback = __versions__[version];
			callback();
			localStorage.setItem('db:version', version);
		}
	};
}

mmm... I was more thinking about functional advices, rather than formal ones. But thx for the suggestion, I may try strict mode whenever I can.

@brunobord I know this is old but just in case anybody else stumbles across this, there is an issue with the version comparison here because '1.0.11' > '1.0.2' // false