Javascript String replaceAll(toReplace, replacee)

// Problem 5. nbsp

// Write a function that replaces non breaking white-spaces in a text with  

var testString = ' This string is  made with the purpose  of having white spaces which can then be  replaced with "&nbsp".';

String.prototype.replaceAll = function(toReplace, replacee) {
    var workString = this;


    while (workString.indexOf(toReplace) > -1) {
        workString = workString.replace(toReplace, replacee);
    }// w  w w .  j a va 2s .c o  m

    return workString;
}

var workedOn = testString.toUpperCase().replaceAll(' ', '&nbps');
console.log(workedOn);