function addAttribute(){
	 availableList = document.getElementById("activities");
	 selectedList = document.getElementById("useractivities[]");
   var addIndex = availableList.selectedIndex;
   if(addIndex < 0)
      return;
   selectedList.appendChild( 
      availableList.options.item(addIndex));
   selectNone(selectedList,availableList);
   //setSize(selectedList,availableList);
}

function selectNone(list1,list2){
    list1.selectedIndex = -1;
    list2.selectedIndex = -1;
    addIndex = -1;
    selIndex = -1;
}

function delAttribute(){
	 availableList = document.getElementById("activities");
	 selectedList = document.getElementById("useractivities[]");
   var selIndex = selectedList.selectedIndex;
   if(selIndex < 0)
      return;
   availableList.appendChild(
      selectedList.options.item(selIndex))
   selectNone(selectedList,availableList);
   //setSize(availableList,selectedList);
}

function selectactivities(){
	selectedList = document.getElementById("useractivities[]");
	for(var i = 0;i < selectedList.length;i++){
		selectedList.options[i].selected = true;
	}

}