JavaScript method to convert a string into a reasonable "key" string.

toKey.js

if(String.prototype.toKey === undefined)
{
	String.prototype.toKey = function(){
		var s = this.toLowerCase();
		s = s.replace(/^[0-9_-]+|[^a-z0-9_\s-]|(\s.\s){1,}|[\s]{2,}|[_\s-]+$/ig, '');
		s = s.replace(/[\-\s_]+/ig,"_");
		return s;
	}
}