Javascript Random Masking

Just a snippet to randomly mask some text, for whatever reason (such as not getting sued).

	String.prototype.replaceAt=function(index, char) {
	return this.substr(0, index) + char + this.substr(index+char.length);
	}
	var REPLACEMENT_CHAR = "*";
	var TO = 5;
	var FROM = 4;
	var str = "Hello World";
	var strLen = str.length;
	var rnd = Math.floor((Math.random()*(TO - FROM + 1)) + FROM);
	for(i = 0; i < strLen; i++){
	if((i+1) >= rnd && ((i+1) % rnd) == 0 && str.charAt(i) != " " && str.charAt(i) != REPLACEMENT_CHAR)
	{
	str = str.replaceAt(i, REPLACEMENT_CHAR);
	}
	}
	alert(str);

view raw random_masking.js hosted with ❤ by GitHub