aprilfools.js

// April Fools '11
// From dA Message Notifier

function romanize(input) {
	var output = input;
	output = output.toUpperCase();
	output = output.replace(/J/g,'I');
	output = output.replace(/U/g,'V');
	//output = output.replace(/W/g,'VV');
	output = output.replace(/([0-9]+)/g, romanNumeral);
	return output;
}

function romanNumeral(decimal) {
	var lookup = {M:1000,CM:900,D:500,CD:400,C:100,XC:90,L:50,XL:40,X:10,IX:9,V:5,IV:4,I:1},
			roman = '',
			i;
	for ( i in lookup ) {
		while ( decimal >= lookup[i] ) {
			roman += i;
			decimal -= lookup[i];
		}
	}
	return roman;
}