var lastID = "";
var IMG_stern = "img/stern.gif";
var HOV_stern = "img/sternHover.gif";
var Sterne = 5;

function vote(imgID) {

    var img = document.getElementById(imgID);
    var imgtext = img.src;
    
    var explodeID = imgID.split("_");
    var imgzahl = explodeID[1];
    
    
    if(lastID!="") { var explodeLastID = lastID.split("_"); var lastImgZahl = explodeLastID[1];  } else { var lastImgZahl = 1; }
    var imgIDzahl = explodeID[0];
    
    //radio setzen
    var InputRadio = document.getElementById("r_" + imgID);
    InputRadio.checked = "checked";
    
    if(lastID!=imgID) {
    
      for (var i = 1; i <= Sterne; i++) {
      
        var VoteImgID = imgIDzahl + "_" + i;
        var ForImg = document.getElementById(VoteImgID);
        
        var imgtext = ForImg.src;
        

        if(i <= imgzahl) {
          ForImg.src = HOV_stern;
        } else {
          ForImg.src = IMG_stern;
        }
        
      }

    }

    lastID = imgID;

}