function DisplayQDiv(QDiv){
 var div;
 var divName; 
 for(var i=1; i<=6; i++)
 {
 divName = "Q" + i;
 div = document.getElementById(divName); 
 if(divName != QDiv)
 div.style.display = "none";
 else
 div.style.display = "inline";
 } 
}