FNV-1a for JavaScript.

fnv1a.js

// 32-bit FNV-1a
// Will produce creepy output if input data is not ASCII

function fnv1a(str) {
	var OFFSET_BASIS = 0x811c9dc5;
	//var PRIME = 0x01000193;

	var h = OFFSET_BASIS;
	for (var i = 0; i < str.length; ++i) {
		h ^= str.charCodeAt(i);
		// This should be h *= PRIME;
		// but /JavaScript/ so /magic/ instead
		h += (h << 1) + (h << 4) + (h << 7) + (h << 8) + (h << 24);
	}
	return h >>> 0;
}