var target = true;
var oldValue = true;
var oldValues = new Array();
var cacheField = true;
var valueOnly = false;
var selectedValue = '';
var cbFunction=null;

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist
 */
function filterDroplist(source,targetId,listName,colName) { 
  target = targetId;
  oldValues = new Array();
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    var index = col.selectedIndex;
    if (index!=null && index >= 0){
	    oldValue = col.options[index].value;
	}
  }
  var filter = "";
  if (source.selectedIndex!=null && source.selectedIndex>=0){
  	filter = source.options[source.selectedIndex].value;
  }
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter,onDropListResponse);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist
 */
function noInactiveFilterDroplist(source,targetId,listName,colName, active) { 
  target = targetId;
  oldValues = new Array();
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    var index = col.selectedIndex;
    if (index!=null && index >= 0){
	    oldValue = col.options[index].value;
	}
  }
  var filter = source.options[source.selectedIndex].value;
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter+'&active='+active,onDropListResponse);
}


/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist and dynamically 
 * get value from database
 */
function filterDynaDroplist(source,targetId,listName,colName) {
  target = targetId;
  oldValues = new Array();
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    var index = col.selectedIndex;
    if (index!=null && index >= 0){
	    oldValue = col.options[index].value;
	}
  }
	
  var filter = source.options[source.selectedIndex].value; 
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter+'&dyna=Y',onDropListResponse);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist and dynamically 
 * get value from database
 */
function multiFilterAndCacheDynaDroplist(source,targetId,listName,colName,cacheName,source2,colName2) {
  cacheField = cacheName;
  target = targetId;
  oldValues = new Array();
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    var index = col.selectedIndex;
    if (index!=null && index >= 0){
	    oldValue = col.options[index].value;
	}
  }
	
  var filter = source.options[source.selectedIndex].value; 
  var filter2 = source2.options[source2.selectedIndex].value; 
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter+'&filterColumn='+colName2+'&filterValue='+filter2+'&dyna=Y',onDropListResponse);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen
 */
function filterAndCacheRoleDroplist(source,targetId,listName,colName,cacheName,inOut) { 
  cacheField = cacheName;
  valueOnly = false;
  selectedValue = '';
  filterDroplistRole(source,targetId,listName,colName,inOut);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist
 */
function filterDroplistRole(source,targetId,listName,colName,inOut) { 
  target = targetId;
  oldValues = new Array();
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    var index = col.selectedIndex;
    if (index!=null && index >= 0){
	    oldValue = col.options[index].value;
	}
  }
  var filter = source.options[source.selectedIndex].value;
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter+'&inOut='+inOut,onDropListResponse);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen
 */
function filterAndCacheMultiDroplist(source,targetId,listName,colName,cacheName) { 
  cacheField = cacheName;
  valueOnly = false;
  selectedValue = '';
  filterMultiDroplist(source,targetId,listName,colName);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist
 */
function filterMultiDroplist(source,targetId,listName,colName) { 
  target = targetId;
  oldValues = new Array();
  var filter = "";
  var count = 0;
  var col = document.getElementsByName(targetId)[0];
  if (col.length>0){
    for (var c=0; c<col.options.length; c++){
      if (col.options[c].selected){
        oldValues[count++]=col.options[c].value;
      }
    }
  }
  for (var c=0; c<source.options.length; c++){
    if (source.options[c].selected){
      if (filter!=""){
        filter+=",";
      }
      filter = filter+source.options[c].value;
    }
  }
  ajaxCaller.getXML('/gaming/DroplistFilter.do?dropList='+listName+'&filterColumn='+colName+'&filterValue='+filter,onDropListResponse);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen
 */
function filterAndCacheDroplist(source,targetId,listName,colName,cacheName) { 
  cacheField = cacheName;
  valueOnly = false;
  selectedValue = '';
  filterDroplist(source,targetId,listName,colName);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist dynamically 
 * get updated value from datebase, and additionally
 * caches the response as a hidden on the screen
 */
function filterDynaCachedDroplist(source,targetId,listName,colName,cacheName) { 
  cacheField = cacheName; 
  valueOnly = false;
  selectedValue = '';
  filterDynaDroplist(source,targetId,listName,colName);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist dynamically 
 * get updated value from datebase, and additionally
 * caches the response as a hidden on the screen
 */
function filterDynaCachedDroplistWithCallback(source,targetId,listName,colName,cacheName,callbackFunction) { 
  cacheField = cacheName; 
  valueOnly = false;
  selectedValue = '';
  cbFunction=callbackFunction;
  filterDynaDroplist(source,targetId,listName,colName);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen
 */
function filterAndCacheDroplistWithCallback(source,targetId,listName,colName,cacheName,callback) { 
  
  cacheField = cacheName;
  valueOnly = false;
  selectedValue = '';
  cbFunction = callback;
  filterDroplist(source,targetId,listName,colName);
  
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen, 
 * without display active items. 
 */
function filterAndCacheDroplistWithCallbackNoInactive(source,targetId,listName,colName,cacheName,callback, active) { 
  cacheField = cacheName;
  valueOnly = false;
  selectedValue = '';
  cbFunction = callback;
  noInactiveFilterDroplist(source,targetId,listName,colName, active);
}

/*
 * Makes a request to the droplist filter action
 * to filter two specified droplist, and one executed after another,
 * and additionally caches the response as a hidden on the screen
 */
function twoFilterDynaCachedDroplist(source,targetId,listName,colName,cacheName, source2,targetId2,listName2,colName2,cacheName2) { 
	var callbackFunction = "filterDynaCachedDroplist(document.gbcDefaultForm.elements['"+source2.name+"'],'"+targetId2+"','"+listName2+"','"+colName2+"','"+cacheName2+"');";
	filterDynaCachedDroplistWithCallback(source,targetId,listName,colName,cacheName,callbackFunction);
}

/*
 * Makes a request to the droplist filter action
 * to filter the specified droplist, and additionally
 * caches the response as a hidden on the screen
 */
function filterAndCacheDroplistLabels(source,targetId,listName,colName,cacheName, selVal) { 
  cacheField = cacheName;
  valueOnly = true;
  selectedValue = selVal;
  filterDroplist(source,targetId,listName,colName);
}

/*
 * Adds a value to a droplist
 */
function addDroplistOption(droplistName,label,value){  
  var droplist = document.getElementsByName(droplistName)[0];
  droplist.options[droplist.options.length] = new Option(label,value);
}

/*
 * Processes the rsponse from the filter action
 */
function onDropListResponse(xml, headers, callingContext) {
  var droplist = document.getElementsByName(target)[0];  
  var oldOnChange = droplist.onChange;
  droplist.options.length = 0;
  
  var root_node = xml.getElementsByTagName('optionList').item(0);
  var items = root_node.getElementsByTagName('option');
  var size = items.length;
  droplist.options[0] = new Option('','');
  if (size==0){
    droplist.options[0].selected = true;
  }
  for (c=0; c<size; c++){

    var label = items[c].getElementsByTagName('label').item(0).firstChild.nodeValue;
    var value = items[c].getElementsByTagName('value').item(0).firstChild.nodeValue;
   
    if(valueOnly == true) {
      droplist.options[c+1] = new Option(value,value);
    } else {
      droplist.options[c+1] = new Option(label,value);
    }
    

    if (selectedValue!='') {
      if(value==selectedValue) {
        droplist.options[c+1].selected = true;
      }
    } else if (value==oldValue){
      droplist.options[c+1].selected = true;
    } else if (oldValues.length>0){
      for (var i=0; i<oldValues.length; i++){
        if (oldValues[i]==value){
          droplist.options[c+1].selected = true;
        }
      }
    }
    
  }
  
  if (cacheField!=true){
    var cache = document.getElementsByName(cacheField)[0];
    
    //Overcome Firefox 4K size limit on text nodes
    var cacheElement = root_node.getElementsByTagName('serializedVersion')[0];
    cacheElement.normalize();
    
    var cacheValue = cacheElement.firstChild.nodeValue;
    cache.value = cacheValue;    
  }
  
  cacheField = true;
  
  if (cbFunction!=null){
    var result = eval(cbFunction);
    if (result!=false) cbFunction = null;
  }
}