/*
	Copyright (c) 2005 The Hertz Corporation 
	All Rights Reserved.  (Unpublished.) 
	 
	The information contained herein is confidential and 
	proprietary to The Hertz Corporation and may not be 
	duplicated, disclosed to third parties, or used for any 
	purpose not expressly authorized by it.  Any unauthorized 
	use, duplication, or disclosure is prohibited by law.
	
	Function Name: createXmlHttpRequest
	Arguments: none
	Returns: browser-specific xmlhttp object or false
*/
function createXMLHttpRequest() {
	try {
		var xmlhttp = new XMLHttpRequest();
			if (xmlhttp.overrideMimeType) {
				xmlhttp.overrideMimeType('text/html');
			}
	} catch(err1) {
	
		var ieXmlHttpVersions = new Array();
		ieXmlHttpVersions[ieXmlHttpVersions.length] = "MSXML2.XMLHttp.5.0";
		ieXmlHttpVersions[ieXmlHttpVersions.length] = "MSXML2.XMLHttp.4.0";
		ieXmlHttpVersions[ieXmlHttpVersions.length] = "MSXML2.XMLHttp.3.0";
		ieXmlHttpVersions[ieXmlHttpVersions.length] = "MSXML2.XMLHttp";
		ieXmlHttpVersions[ieXmlHttpVersions.length] = "Microsoft.XMLHttp";
		
		var i;
		for (i=0; i < ieXmlHttpVersions.length; i++) {
			try {
				
				var xmlhttp = new ActiveXObject(ieXmlHttpVersions[i]);
				break;
			} catch (err2) {
				//do nothing
			}
		}
	}
	return xmlhttp;
}

/*
	Function Name: $
	Arguments: fElementId
	Returns: It gives reference to an element
*/
function $(fElementId){
	return document.getElementById(fElementId);
}

/*
	Function Name: getElementsByClassName
	Arguments: fElement, strTagName, strClassName
	Returns: It gets all elements with a certain class name
*/
function getElementsByClassName(fElement, strTagName, strClassName){
	var arrElements = (strTagName == "*" && fElement.all)? fElement.all : fElement.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i< arrElements.length; i++){
		oElement = arrElements[i];		
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}	
	}
	return (arrReturnElements)
}

/*
	Function Name: addClassName
	Arguments: fElement, strClassName
	Returns: Add a class name to an element, 
	Returns: Checks if the element has class
*/
function addClassName(fElement, strClassName){
	var strCurrentClass = fElement.className;
	if(!new RegExp(strClassName, "i").test(strCurrentClass)){
		fElement.className = strCurrentClass + ((strCurrentClass.length > 0)? " " : "") + strClassName;
	}
}

/*
	Function Name: addClassName
	Arguments: fElement, strClassName
	Returns: Remove a class name from an element, 
	Returns: Removes class name and spaces
*/
function removeClassName(fElement, strClassName){
	var oClassToRemove = new RegExp((strClassName + "\s?"), "i");
	fElement.className = fElement.className.replace(oClassToRemove, "").replace(/^\s?|\s?$/g, "");
}

function findPos(obj) {
  var curleft = curtop = 0;
  if (obj.offsetParent) {
	  curleft = obj.offsetLeft
	  curtop = obj.offsetTop
	  while (obj = obj.offsetParent) {
		curleft += obj.offsetLeft
		curtop += obj.offsetTop
	  }
  }
  return [curleft,curtop];
}



var ELEMENT_NODE = 1; 
var ATTRIBUTE_NODE = 2; 
var TEXT_NODE = 3; 
var CDATA_SECTION_NODE = 4; 
var ENTITY_REFERENCE_NODE = 5;
var ENTITY_NODE = 6;
var PROCESSING_INSTRUCTION_NODE = 7;
var COMMENT_NODE = 8;
var DOCUMENT_NODE = 9;
var DOCUMENT_TYPE_NODE = 10;
var DOCUMENT_FRAGMENT_NODE = 11;
var NOTATION_NODE = 12;

/*
	Function Name: AttachEvent
	Arguments: OBJ,EVT,FNCT
	Action: cross browser: attaches event to passed in object.  FNCT will be the event's callback function.
	Returns: true on success
*/
function AttachEvent(OBJ,EVT,FNCT)
{
	if (OBJ.addEventListener)
	{
		OBJ.addEventListener(EVT,FNCT,false);
		return true;
	} 
	else if (OBJ.attachEvent) 
	{
		return OBJ.attachEvent("on"+EVT,FNCT);
	}
}

/*
	Function Name: RemoveTextNodes
	Arguments: NODE
	Action: Removes all child "empty" text nodes from an element.
	Returns: nothing
	Notes: The purpose of this function it to equalize the Mozilla and IE DOMs.
*/ 
function RemoveTextNodes(NODE,RECURSIVE) {

	var ChildNode;
	for (var i=NODE.childNodes.length-1; i>=0; i--)
	{
		ChildNode = NODE.childNodes[i];
		if (ChildNode.nodeType == TEXT_NODE && !(/\S/.test(ChildNode.nodeValue)))
		{
			NODE.removeChild(ChildNode);
		}
		else if (RECURSIVE && ChildNode.hasChildNodes())
		{
			RemoveTextNodes(ChildNode,true);
		}
	}
}