function getCheckedValuesByName(checkboxname) {
   var e=document.getElementsByName(checkboxname);
   var p="";

   for (var j=0;j<e.length;j++) {
      if (e[j].checked) p+=e[j].value+" ";
   };
   return p;
}

function getSelectedValueById(selectname,idx) {
   if (idx == undefined) idx = 0;
   var i=document.getElementById(selectname).selectedIndex;
   return document.getElementById(selectname).options[i+idx].value;
}

function checkEnter(event) {
   event=event || window.event;
   getEvent=event.keyCode;
   if (getEvent == "13") {
      return true;
   }
   return false;
}