function getData()
    {
       var d = document.getElementsByClassName('inputDateCell');
       var g = document.getElementsByClassName('inputGradeCell');
       var c = document.getElementsByClassName('col_4');
       var n = document.getElementsByClassName('col_0');
       var disp = Object.keys(c).length - Object.keys(g).length;
       var newData = [];
       var newCfu=[];
       var form = d3.time.format("%d/%m/%Y");

       for(var i=0; i<Object.keys(d).length-1; i++)
       {
           if(form.parse(d[i].value) !== null && g[i].value.length !== 0 )
           {
               newData.push({"data":d[i].value,"voto":g[i].value,"nome":n[i+disp].innerHTML});
               newCfu[i]=(parseInt(c[i+disp].innerHTML));
           }
       }
       update(newData,newCfu);
    }

    function update(d,c)
    {
       var svgCareer = d3.select("#starPath");
       svgCareer.remove();
       var newData = data.concat(d);
       drawStarPath('#careerStarPath',carStarWidth,carStarHeight,newData);

       var svgProgress = d3.select("#proDonut");
       svgProgress.remove();
       var newCfuNum = cfuTot+sum(c);
       var newProg = toFixed((newCfuNum/180)*100,2);
       drawDonutChart('#progressDonut',newProg,proWidth,proHeight,"#006699","#a3becc","proDonut");

       var g = [];
       for (var i=0; i < Object.keys(d).length; i++)
           g.push(parseInt(d[i].voto));

      var newGrade = grade.concat(g);
      var newCfu   = cfu.concat(c);
      var newPond=toFixed(wmean(newGrade,newCfu),2);
      var newTitle=toFixed(tmean(newPond),2);

      document.getElementById("proCfuCell").innerHTML = "CFU: "+newCfuNum;
      document.getElementById("proMeanCell").innerHTML = "MEDIA: "+newPond;
      document.getElementById("proTitleCell").innerHTML = "TITOLO: "+newTitle;

    }

    function reset()
    {
        var svgCareer = d3.select("#starPath");
        svgCareer.remove();
        drawStarPath('#careerStarPath',carStarWidth,carStarHeight,data);

       var svgProgress = d3.select("#proDonut");
       svgProgress.remove();
       drawDonutChart('#progressDonut',progress,proWidth,proHeight,"#006699","#a3becc","proDonut");
       document.getElementById("proCfuCell").innerHTML = "";
      document.getElementById("proMeanCell").innerHTML = "";
      document.getElementById("proTitleCell").innerHTML = "";
    }