scatenare evento dopo un tot di volte

[paxal78]

var table = document.getElementById("table");
    var numRows = table.rows.length;
       var eventLunched = false;
     var verImgRed = 0
       for (var i=numRows-1; i > 0; i--){
        if(i==6) {
        var numCells = table.rows[i].cells.length;
        for (var j=0; j<numCells; j++){
           var cellsCount = table.rows[i].cells[j];
           var imgCells = cellsCount.innerHTML;
           //alert(cellsCount);
                    if(imgCells.indexOf("cerchio_red") > -1){
                      verImgRed++;
                   } 
                    if(verImgRed == 4 && eventLunched === false){
                       tuoEvento();
                       eventLunched = true;
                       }
           var verImgBlack = imgCells.indexOf("cerchio_black") > -1;
            alert("works");
            }    
function tuoEvento(){
   //codice
}