var ajaxBox_offsetX = 0;
var ajaxBox_offsetY = 0;
var minimumLettersBeforeLookup = 2;	// Number of letters entered before a lookup is performed.
var ajax_list_objects = new Array();
var ajax_list_cachedLists = new Array();
var ajax_list_activeInput = false;
var ajax_list_activeItem;
var ajax_list_optionDivFirstItem = false;
var ajax_list_currentLetters = new Array();
var ajax_optionDiv = false;
var ajax_optionDiv_iframe = false;

var ajax_list_MSIE = false;
if(navigator.userAgent.indexOf('MSIE')>=0 && navigator.userAgent.indexOf('Opera')<0)
	{ajax_list_MSIE=true;}

var currentListIndex = 0;

/* Definición de la clase AJAX de base */

function AJAX(file) 
	{
		this.xmlhttp = null;

		this.resetData = function() 
			{
				this.method = "POST";
				this.queryStringSeparator = "?";
				this.argumentSeparator = "&";
				this.URLString = "";
				this.encodeURIString = true;
				this.execute = false;
				this.element = null;
				this.elementObj = null;
				this.requestFile = file;
				this.vars = new Object();
				this.responseStatus = new Array(2);
  			};

		this.resetFunctions = function() 
			{
		  		this.onLoading = function() { };
  				this.onLoaded = function() { };
		  		this.onInteractive = function() { };
  				this.onCompletion = function() { };
		  		this.onError = function() { };
				this.onFail = function() { };
			};

		this.reset = function() 
			{
				this.resetFunctions();
				this.resetData();
			};

		this.createAJAX = function() 
			{
				try 
					{
						this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
					} 
				catch (e1) 
					{
						try 
							{
								this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
							} 
						catch (e2) 
							{
								this.xmlhttp = null;
							}
					}

				if (! this.xmlhttp) 
					{
						if (typeof XMLHttpRequest != "undefined") 
							{
								this.xmlhttp = new XMLHttpRequest();
							} 
						else 
							{
								this.failed = true;
							}
					}
			};
		
		this.setVar = function(name, value)
			{
				this.vars[name] = Array(value, false);
			};

		this.encVar = function(name, value, returnvars) 
			{
				if (true == returnvars) 
					{
						return Array(encodeURIComponent(name), encodeURIComponent(value));
					} 
				else 
					{
						this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
					}
			}

	this.processURLString = function(string, encode) 
		{
			encoded = encodeURIComponent(this.argumentSeparator);
			regexp = new RegExp(this.argumentSeparator + "|" + encoded);
			varArray = string.split(regexp);
			for (i = 0; i < varArray.length; i++)
				{
					urlVars = varArray[i].split("=");
					if (true == encode)
						{
							this.encVar(urlVars[0], urlVars[1]);
						} 
					else 
						{
							this.setVar(urlVars[0], urlVars[1]);
						}
				}
		}
	
	this.createURLString = function(urlstring) 
		{
			if (this.encodeURIString && this.URLString.length) 
				{
					this.processURLString(this.URLString, true);
				}

			if (urlstring) 
				{
					if (this.URLString.length) 
						{
							this.URLString += this.argumentSeparator + urlstring;
						} 
					else 
						{
							this.URLString = urlstring;
						}
				}

		// prevents caching of URLString
		this.setVar("rndval", new Date().getTime());

		urlstringtemp = new Array();
		for (key in this.vars) 
			{
				if (false == this.vars[key][1] && true == this.encodeURIString) 
					{
						encoded = this.encVar(key, this.vars[key][0], true);
						delete this.vars[key];
						this.vars[encoded[0]] = Array(encoded[1], true);
						key = encoded[0];
					}
			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
			}
		if (urlstring)
			{
				this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
			} 
		else 
			{
				this.URLString += urlstringtemp.join(this.argumentSeparator);
			}
	}

	this.runResponse = function() 
		{
			eval(this.response);
		}

	this.runAJAX = function(urlstring) 
		{
			if (this.failed) 
				{
					this.onFail();
				} 
			else 
				{
					this.createURLString(urlstring);
					if (this.element) 
						{
							this.elementObj = document.getElementById(this.element);
						}
					if (this.xmlhttp) 
						{
							var self = this;
							if (this.method == "GET") 
								{
									totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
									this.xmlhttp.open(this.method, totalurlstring, true);
								} 
							else 
								{
									this.xmlhttp.open(this.method, this.requestFile, true);
									try 
										{
											this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
										} 
									catch (e) 
										{ }
								}

							this.xmlhttp.onreadystatechange = function() 
								{
									switch (self.xmlhttp.readyState) 
										{
											case 1:
												self.onLoading();
												break;
											case 2:
												self.onLoaded();
												break;
											case 3:
												self.onInteractive();
												break;
											case 4:
												self.response = self.xmlhttp.responseText;
												self.responseXML = self.xmlhttp.responseXML;
												self.responseStatus[0] = self.xmlhttp.status;
												self.responseStatus[1] = self.xmlhttp.statusText;
												if (self.execute) 
													{
														self.runResponse();
													}

												if (self.elementObj) 
													{
														elemNodeName = self.elementObj.nodeName;
														elemNodeName.toLowerCase();
														if (elemNodeName == "input"
														|| elemNodeName == "select"
														|| elemNodeName == "option"
														|| elemNodeName == "textarea") 
															{
																self.elementObj.value = self.response;
															} 
														else 
															{
																self.elementObj.innerHTML = self.response;
															}
													}
												if (self.responseStatus[0] == "200") 
													{
														self.onCompletion();
													} 
												else 
													{
														self.onError();
													}

												self.URLString = "";
												break;
										}
								};
						this.xmlhttp.send(this.URLString);
					}
				}
			};

		this.reset();
		this.createAJAX();
	}
/* Fin de la clase AJAX */

function ajax_getTopPos(inputObj)
	{
		var returnValue = inputObj.offsetTop;
		while((inputObj = inputObj.offsetParent) != null)
			{returnValue += inputObj.offsetTop;}
		return returnValue;
	}

function ajax_list_cancelEvent()
	{
		return false;
	}

function ajax_getLeftPos(inputObj)
	{
		var returnValue = inputObj.offsetLeft;
		while((inputObj = inputObj.offsetParent) != null)
			{returnValue += inputObj.offsetLeft;}
		return returnValue;
	}

function ajax_option_setValue(e,inputObj)
	{
		if(!inputObj)
			{inputObj=this;}
		var tmpValue = inputObj.innerHTML;
		if(ajax_list_MSIE)
			{
				tmpValue = inputObj.innerText;
			}
		else 
			{
				tmpValue = inputObj.textContent;
			}
		if(!tmpValue)
			{
				tmpValue = inputObj.innerHTML;
			}
		ajax_list_activeInput.value = tmpValue;
		if(document.getElementById('ED_' + ajax_list_activeInput.name))
			{
				//alert(inputObj.id);
				document.getElementById('ED_' + ajax_list_activeInput.name).value = inputObj.id; 
			}
		ajax_options_hide();
	}

function ajax_options_hide()
	{
		if(ajax_optionDiv)
			{
				ajax_optionDiv.style.display='none';
			}	
		if(ajax_optionDiv_iframe)
			{
				ajax_optionDiv_iframe.style.display='none';
			}
	}

function ajax_options_rollOverActiveItem(item,fromKeyBoard)
	{
		if(ajax_list_activeItem)
			{
				ajax_list_activeItem.className='optionDiv';
			}
		item.className='optionDivSelected';
		ajax_list_activeItem = item;
		if(fromKeyBoard)
			{
				if(ajax_list_activeItem.offsetTop>ajax_optionDiv.offsetHeight)
					{
						ajax_optionDiv.scrollTop = ajax_list_activeItem.offsetTop - ajax_optionDiv.offsetHeight + ajax_list_activeItem.offsetHeight + 2 ;
					}
				if(ajax_list_activeItem.offsetTop<ajax_optionDiv.scrollTop)
					{
						ajax_optionDiv.scrollTop = 0;	
					}
			}
	}

function ajax_option_list_buildList(letters,paramToExternalFile)
	{
		ajax_optionDiv.innerHTML = '';
		ajax_list_activeItem = false;
		if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length<=1)
			{
				ajax_options_hide();
				return;			
			}
		ajax_list_optionDivFirstItem = false;
		var optionsAdded = false;
		/*
		var div = document.createElement('DIV');
		div.innerHTML=ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length;
		div.style.alignment='center';
		ajax_optionDiv.appendChild(div);
		*/
		for(var no=0;no<ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length;no++)
			{
				if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].length==0)
					{continue;}
				optionsAdded = true;
				var div = document.createElement('DIV');
				var items = ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()][no].split(/###/gi);
				if(ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()].length==1 && ajax_list_activeInput.value == items[0])
					{
						ajax_options_hide();
						return;						
					}
				var sTexto;
				sTexto=items[items.length-1];
				var lLen;
				lLen=letters.length;
				var lPos;
				lPos=sTexto.toUpperCase().indexOf(letters.toUpperCase());
				sTexto=sTexto.substring(0,lPos)+'<b>'+sTexto.substring(lPos, lPos+lLen)+'</b>'+sTexto.substring(lPos+lLen)
				
				div.innerHTML = sTexto;
				div.id = items[0];
				div.className='optionDiv';
				div.onmouseover = function(){ ajax_options_rollOverActiveItem(this,false) }
				div.onclick = ajax_option_setValue;
				if(!ajax_list_optionDivFirstItem)
					{
						ajax_list_optionDivFirstItem = div;
					}
				ajax_optionDiv.appendChild(div);
			}	
		if(optionsAdded)
			{
				ajax_optionDiv.style.display='block';
			}
		if(ajax_optionDiv_iframe)
			{
				ajax_optionDiv_iframe.style.display='';
			}
		ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
	}

function ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,whichIndex)
	{
		if(whichIndex!=currentListIndex)
			{return;}
		var letters = inputObj.value;
		var content = ajax_list_objects[ajaxIndex].response;
		
		var elements = content.split('|');
		
		/*
		var elements = new Array();

		var objXmlDom = new ActiveXObject("Microsoft.XMLDOM");	//Crea un objeto DOM Document XML.
		objXmlDom.async="false";
		objXmlDom.loadXML(content);	//Carga la respuesta AJAX en el documento.

		for (var i=0;i<objXmlDom.selectNodes("Raiz/Item").length;i++)	//Recorre la colección.
			{
				lId=objXmlDom.selectSingleNode("Raiz/Item[" + i + "]").getAttribute("Id");
				sDesc=objXmlDom.selectSingleNode("Raiz/Item[" + i + "]").getAttribute("Descripcion");
				elements[i]=lId.toString()+'###'+sDesc.toString()	//Asigna cada elemento.
			}

		*/
		
		ajax_list_cachedLists[paramToExternalFile][letters.toLowerCase()] = elements;
		ajax_option_list_buildList(letters,paramToExternalFile);
	}

function ajax_option_resize(inputObj)
	{
		ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
		ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
		if(ajax_optionDiv_iframe)
			{
				ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
				ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;			
			}		
	}

function AbrirPicker(inputObj,srcPage,paramToExternalFile,e)
	{
		if(e.keyCode==13 || e.keyCode==9)
			{return;}
		if(ajax_list_currentLetters[inputObj.name]==inputObj.value)	
			{return;}
		if(!ajax_list_cachedLists[paramToExternalFile])ajax_list_cachedLists[paramToExternalFile] = new Array();
		ajax_list_currentLetters[inputObj.name] = inputObj.value;
		if(!ajax_optionDiv)
			{
				ajax_optionDiv = document.createElement('DIV');
				ajax_optionDiv.id = 'ajax_listOfOptions';	
				ajax_optionDiv.style.width=inputObj.style.width;
				document.body.appendChild(ajax_optionDiv);
				if(ajax_list_MSIE)
					{
						ajax_optionDiv_iframe = document.createElement('IFRAME');
						ajax_optionDiv_iframe.border='0';
						ajax_optionDiv_iframe.style.width = ajax_optionDiv.clientWidth + 'px';
						ajax_optionDiv_iframe.style.height = ajax_optionDiv.clientHeight + 'px';
						ajax_optionDiv_iframe.id = 'ajax_listOfOptions_iframe';
						document.body.appendChild(ajax_optionDiv_iframe);
					}
				var allInputs = document.getElementsByTagName('INPUT');
				for(var no=0;no<allInputs.length;no++)
					{
						if(!allInputs[no].onkeyup)
							{
								allInputs[no].onfocus = ajax_options_hide;
							}
					}			
				var allSelects = document.getElementsByTagName('SELECT');
				for(var no=0;no<allSelects.length;no++)
					{
						allSelects[no].onfocus = ajax_options_hide;
					}
				var oldonkeydown=document.body.onkeydown;
				if(typeof oldonkeydown!='function')
					{
						document.body.onkeydown=ajax_option_keyNavigation;
					}
				else
					{
						document.body.onkeydown=function(){	oldonkeydown();ajax_option_keyNavigation() ;}
					}
				var oldonresize=document.body.onresize;
				if(typeof oldonresize!='function')
					{
						document.body.onresize=function() {ajax_option_resize(inputObj); };
					}
				else
					{
						document.body.onresize=function(){oldonresize();ajax_option_resize(inputObj) ;}
					}
			
			}
		if(inputObj.value.length<minimumLettersBeforeLookup)
			{
				ajax_options_hide();
				return;
			}
		ajax_optionDiv.style.top = (ajax_getTopPos(inputObj) + inputObj.offsetHeight + ajaxBox_offsetY) + 'px';
		ajax_optionDiv.style.left = (ajax_getLeftPos(inputObj) + ajaxBox_offsetX) + 'px';
		if(ajax_optionDiv_iframe)
			{
				ajax_optionDiv_iframe.style.left = ajax_optionDiv.style.left;
				ajax_optionDiv_iframe.style.top = ajax_optionDiv.style.top;			
			}
		ajax_list_activeInput = inputObj;
		ajax_optionDiv.onselectstart =  ajax_list_cancelEvent;
		currentListIndex++;
		if(ajax_list_cachedLists[paramToExternalFile][inputObj.value.toLowerCase()])
			{
				ajax_option_list_buildList(inputObj.value,paramToExternalFile,currentListIndex);			
			}
		else
			{
				var tmpIndex=currentListIndex/1;
				ajax_optionDiv.innerHTML = '';
				var ajaxIndex = ajax_list_objects.length;
				ajax_list_objects[ajaxIndex] = new AJAX();
				//var url = srcPage + '?' + paramToExternalFile + '=1&letters=' + inputObj.value.replace(" ","+");
				var url = srcPage + '?' + paramToExternalFile + '=1&letters=' + URLEncode(inputObj.value);
				ajax_list_objects[ajaxIndex].requestFile = url;	// Specifying which file to get
				ajax_list_objects[ajaxIndex].onCompletion = function(){ ajax_option_list_showContent(ajaxIndex,inputObj,paramToExternalFile,tmpIndex); };	// Specify function that will be executed after file has been found
				ajax_list_objects[ajaxIndex].runAJAX();		// Execute AJAX function		
			}
	}

function ajax_option_keyNavigation(e)
	{
		if(document.all)
			{e = event;}
		if(!ajax_optionDiv)
			{return;}
		if(ajax_optionDiv.style.display=='none')
			{return;}
		if(e.keyCode==38)
			{	// Up arrow
				if(!ajax_list_activeItem)
					{return;}
				if(ajax_list_activeItem && !ajax_list_activeItem.previousSibling)
					{return;}
				ajax_options_rollOverActiveItem(ajax_list_activeItem.previousSibling,true);
			}
		if(e.keyCode==40)
			{	// Down arrow
				if(!ajax_list_activeItem)
					{
						ajax_options_rollOverActiveItem(ajax_list_optionDivFirstItem,true);
					}
				else
					{
						if(!ajax_list_activeItem.nextSibling)
							{return;}
						ajax_options_rollOverActiveItem(ajax_list_activeItem.nextSibling,true);
					}
			}
		if(e.keyCode==13 || e.keyCode==9)
			{	// Enter key or tab key
				if(ajax_list_activeItem && ajax_list_activeItem.className=='optionDivSelected')
					{ajax_option_setValue(false,ajax_list_activeItem);}
				if(e.keyCode==13)
					{return false;}
				else 
					{return true;}
			}
		if(e.keyCode==27)
			{	// Escape key
				ajax_options_hide();			
			}
	}
document.documentElement.onclick = autoHideList;

function autoHideList(e)
	{
		if(document.all)
			{e = event;}
		if (e.target) 
			{source = e.target;}
		else if (e.srcElement) 	
			{source = e.srcElement;}
		if (source.nodeType == 3) // defeat Safari bug
			{source = source.parentNode;}
		if(source.tagName.toLowerCase()!='input' && source.tagName.toLowerCase()!='textarea')
			{ajax_options_hide();}
	}
function URLEncode(sString)
	{
		// The Javascript escape and unescape functions do not correspond
		// with what browsers actually do...
		var SAFECHARS = "0123456789" +					// Numeric
						"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
						"abcdefghijklmnopqrstuvwxyz" +
						"-_.!~*'()";					// RFC2396 Mark characters
		var HEX = "0123456789ABCDEF";
		var plaintext = sString;
		var encoded = "";
		for (var i = 0; i < plaintext.length; i++ ) 
			{
				var ch = plaintext.charAt(i);
	    		if (ch == " ") 
					{
					    encoded += "+";				// x-www-urlencoded, rather than %20
					} 
				else if (SAFECHARS.indexOf(ch) != -1) 
					{
					    encoded += ch;
					} 
				else 
					{
					    var charCode = ch.charCodeAt(0);
						if (charCode > 255) 
							{
								/*
								alert( "Unicode Character '" 
                			    + ch 
		                        + "' cannot be encoded using standard URL encoding.\n" +
						          "(URL encoding only supports 8-bit characters.)\n" +
								  "A space (+) will be substituted." );
								*/
								encoded += "+";
							} 
						else 
							{
								encoded += "%";
								encoded += HEX.charAt((charCode >> 4) & 0xF);
								encoded += HEX.charAt(charCode & 0xF);
							}
					}
			} // for
		return encoded;
	}