var totList=document.getElementById("tipol").tBodies[0].rows.length;

function showStore(q){
    var numberSel=q.id.replace("GruppoStore","");
   
    var i;
    var att;
    var styleClass;
     if (navigator.appName.indexOf("Expl")!=-1){ // explorer 
                att="className"; 
        } else{ 
                att="class";
         } 
    for (i=0; i<totList; i++){
         var divSel="ElencoStore"+i;
         var linkSel="GruppoStore"+i;
         
         if (i==numberSel){
            document.getElementById(divSel).style.display="";
            styleClass="On";
            document.getElementById(linkSel).className=styleClass;
         }else{
            document.getElementById(divSel).style.display="none";
            styleClass="";
            document.getElementById(linkSel).className=styleClass;
         }
       
    }
    
}