This is more of a JavaScript coding question.  I have run into the problem of IE not supporting the JavaScript implementation of the Array.IndexOf function.  There is a good description of the problem and a solution here: http://stellapower.net/content/javascript-support-and-arrayindexof-ie

 

Unfortunately I have not been able to get it to work and am looking for feedback on where I am going wrong.  IE complains that prototype is undefined.  Having never used prototype before I am at a loss as to what I am missing.

I have this code (CSJS) in the Submit button of my XPage:

    var bool_repTeam = false;
    var str_thisTeam = document.getElementById("#{id:surveyTeam}").value;
    var repTeams = new Array("P1", "B1", "M1");
    var str_browser = "#{javascript:context.getUserAgent().getBrowser()}";

    if(str_browser == "IE") {
        repTeams.prototype.indexOf = function(obj){
            for(var i=0; i<this.length; i++){
                if(this[i]==obj){
                    bool_repTeam = true;
                }
            }
        }
    } else {
        if(repTeams.indexOf(str_thisTeam) > -1) {
            bool_repTeam = true;
        }
    }

 

Anyone come across this before?