Michael Hartmayer

String.prototype.replaceAll = function(s, r, n) {
	if( this.toString().indexOf(s) < n ) n = 0;
	if( !n ) return this.toString().split( s ).join( r );
 
	var j = this.toString();
	while( n-- ) {
		j = j.replace( s, r );
	}
 
	return j;
}
 
var TestString = "I Love My Pie So Much, Don't You?";
 
// Usage
console.log( TestString.replace("o", "*") );
console.log( TestString.replaceAll("o", "*", 2) );