Why can't I dynamically pass a var into this function?


All,

I have absolutely no clue as to what the difference is between these two snippets but the on that is hard coded works and the other doesn't. I know it's something incredible stupid that I should know but I just cant see it.

//This works if it's hard coded:
function setTimer(id,status){
    if(status=="start"){
        txt = new timer('txt',id);
        txt.startTimer();
    }else if(typeof txt == "object"){
        txt.stopTimer();
        txt = '';
    }
}

//This doesn't work
function setTimer(id,status){
    var x = txt;
    if(status=="start"){
        x = new timer(x,id);
        x.startTimer();
    }else if(typeof txt == "object"){
        x.stopTimer();
        x = '';
    }
}

Any help on this would be greatly appreciated. Thanks in advance. - CES

The rest of the page is as follows:

function timer(name,id){
   var secs = 10;
   var timerID = null;
   var timerRunning = false;
   var delay = 1000;

    this.startTimer = function (){
        this.stopTimer();
        this.counterStatus();
    }
    this.stopTimer = function (){
        if(timerRunning != null){
            clearTimeout(timerID);
            this.timerRunning = false;
            secs = 10;
        }
    }
    this.resetTimer = function (){
        stopTimer();
    }
    this.counterStatus = function (){
        if (secs==0){
            this.stopTimer();
            document.getElementById(id).style.backgroundColor = "Red";
        }else{
            secs = secs - 1;
            timerRunning = true;
            document.getElementById(id).innerHTML = secs;
            timerID = self.setTimeout(name + ".counterStatus()", delay);
        }
    }
}


    <div id="id_test" style="width:100px; height:100px; background-color:blue;" onmouseover="setTimer('','')" onmouseout="setTimer('id_test','start')">
    </div>
.

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