Javascript : unresponsive script?

private void changePage(int startIndex, int recordSize) {

    markChanges(); //this method stores currently selected rows

    resultListbox.getItems().clear();	//clear the listbox	
    int endIndex = startIndex + recordSize;
    if (endIndex >= allResults.size())
	endIndex = allResults.size();
    if (endIndex < 0)
	endIndex = 0;

    //create the sublist for the page
    List<Sequence> pageList = allResults.subList(startIndex, endIndex);
 
    pageResults = pageList;
		
   //add  rows(list items)
   //**
   for (Sequence seq : pageList) {
	Listitem litem = new Listitem();
	litem.setValue(seq);
	litem.setSelected(seq.isSelected());

	// Add result rows
         int ind=0;
		for (String val : seq.getValues()) {
			boolean isSequence=false;
			Column col=colList.get(ind);
				
			String linkout=col.getLinkout();
			String linkmask=col.getLinkmask();
			
			if(sequenceCols.contains(new Integer(ind))){
				isSequence=true;
			}
                //**
		Listcell acell = new Listcell();
				
			Label lbl=new Label();

	   		  if (val.length() > 23) {					
					//**
					Popup popup = new Popup();										
					popup.setHeight("100px");
					Vbox vbox = new Vbox();
					Html html=new Html();
					if(isSequence){
					   String s=Common.generateColoredProtienHTML(val);
						html.setContent(s.toUpperCase());
					}
					else{
					  html.setContent("<span style='color:black;>"+val+"<span>");	
					}
					vbox.appendChild(html);
					popup.appendChild(vbox);					
					popup.setParent(getParent().getParent().getParent());						

					
					val = val.substring(0, 23) + "...";					
					
					acell.setContext(popup);				

				}
				
				//**add some Html code to cell
				if(isSequence){
					val=Common.generateColoredProtienHTML(val);
					Html html=new Html();
					html.setContent(val.toUpperCase());
										
					acell.appendChild(html);
				}else if(linkout!=null && (val!=null && !val.equals("") )){															
					String urlVal=new String(val);
					if (linkmask!=null && linkmask.equals("xxxx")){						
						urlVal=urlVal.substring(0,4);
					}
					
					String url=LinkoutUtils.processURL(linkout, urlVal);					
					String ss="<i><a style='font-size:10px' href='"+url+"' target='_blank'>"+val+"</a></i>";
					Html html=new Html();
					html.setContent(ss);					
					acell.appendChild(html);
				   
				}else{					
					lbl.setValue(val);
					acell.appendChild(lbl);					
				}
				
				//add PDB JMol link
                                //**
				if(col.getDispName().equalsIgnoreCase("pdb id")){
					addPDBButton(acell,val); //add a Button to cell
				}
				
				litem.appendChild(acell);
				ind++;
			}
			resultListbox.appendChild(litem);

		}
	}

ListCell acell;
.
.
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acell.addEventListener("onRightClick", new EventListener() {

				public void onEvent(Event arg0) throws Exception {
						String bal = new String(innerVal);
						String s = Common.generateColoredProtienHTML(bal);

                                                /** Clear the content of the Popup
						thePopup.getChildren().clear();
                                                /***Addd some HTML code 

                                                if (innerIsSequence) {
								Html html = new Html();
								html.setContent("<pre>"+s.toUpperCase()+"</pre>");
								thePopup.appendChild(html);
							} else {
								thePopup.appendChild(new Label(bal));	
							}
							
                                                        //** open the Popup
							thePopup.open(acell);
							

						}
					});