Can this be any worse ?

Can this be any worse ?


if (!Array.prototype.containsKey) {
Array.prototype.containsKey = function(srch) {
for ( var key in this ) {
if ( key.toLowerCase() == srch.toLowerCase() ) {
return true;
}
}
return false;
};
}
................
var getNamedEntity = function(input) {
var entity = '';
while (input.hasNext()) {
var c = input.peek();
if (c.match(/[A-Za-z]/)) {
entity += c;
input.next();
if (entityToCharacterMap.containsKey('&' + entity)) {
if (input.peek(';')) input.next();
break;
}
} else if (c == ';') {
input.next();
} else {
break;
}
}

return String.fromCharCode(entityToCharacterMap.getCaseInsensitive('&' + entity));
};
............
var entityToCharacterMap = [];
entityToCharacterMap["""] = "34"; /* 34 : quotation mark */
entityToCharacterMap["&"] = "38"; /* 38 : ampersand */
entityToCharacterMap["<"] = "60"; /* 60 : less-than sign */
entityToCharacterMap[">"] = "62"; /* 62 : greater-than sign */



Let's make contest ;-)
How many "bad practices" (cannot find other polite word)
can you "spot" in this code ?