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var xmlHttp;

var is_ie = (navigator.userAgent.indexOf('MSIE') >= 0) ? 1 : 0;

var is_ie5 = (navigator.appVersion.indexOf("MSIE 5.5")!=-1) ? 1 : 0;

var is_opera = ((navigator.userAgent.indexOf("Opera6")!=-1)||(navigator.userAgent.indexOf("Opera/6")!=-1)) ? 1 : 0;

//netscape, safari, mozilla behave the same???

var is_netscape = (navigator.userAgent.indexOf('Netscape') >= 0) ? 1 : 0;

var ajaxdivname;

//

//	Load/Hide/Show an Ajax expander

//	BaseId - Base for IDs to process

//			 IMG_BaseId - image to to toggle

//             TGL_BaseId - element to show/hide if found else use BaseId

//             BaseId - Div to load Ajax into

//	url - Url used to load subcontrol

function ToggleLoadControl(baseId, url)

{

  var img, dmode;

  var imgel = MM_findObj("IMG_" + baseId);

  var shel =  MM_findObj("TGL_" + baseId);

  var divel = MM_findObj(baseId);

  if ( !shel ) {

      shel = divel;

  }

  var showing = imgel.getAttribute("data-show");

  if(showing == 1) {

      img = "images/bt_minus.gif";

      dmode = '';

      showing = 2

  } else if(showing == 2) {

      img = "images/bt_plus.gif";

      dmode = 'none';

      showing = 1;

  } else if (url == null) {

      img = "images/bt_plus.gif";

      dmode = 'none';

      showing = 1;

  } else {

      img = "images/bt_minus.gif";

      dmode = '';

      showing = 2;

      // Set div name for ajax loading

      ajaxdivname = baseId;

      //Create the xmlHttp object to use in the request

      //stateChangeHandler will fire when the state has changed, i.e. data is received back

      // This is non-blocking (asynchronous)

      xmlHttp = GetXmlHttpObject(stateChangeHandler);

      //Send the xmlHttp get to the specified url

      xmlHttp_Get(xmlHttp, url);

  }

  // Update image and attributes

  imgel.src = img;

  shel.style.display = dmode;

  imgel.setAttribute("data-show", showing);

}

//stateChangeHandler will fire when the state has changed, i.e. data is received back

// This is non-blocking (asynchronous)

function stateChangeHandler()

{

    var str;

    //readyState of 4 or 'complete' represents that data has been returned

    if (xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete'){

        if ( xmlHttp.status != 200 ) {

            // Generate an error message

            str = "Ajax Load Error [" + xmlHttp.status + ']: ' + xmlHttp.statusText + '<br>Url:' + xmlHttp.responseURL;

        } else {

            //Gather the results from the callback

            str = xmlHttp.responseText;

        }

        //Populate the innerHTML of the div with the results

		MM_findObj( ajaxdivname ).innerHTML = str;

    }

}

//stateComboChangeHandler will fire when the state has changed, i.e. data is received back

// This is non-blocking (asynchronous)

function stateComboChangeHandler()

{

	//Expected response data: text|-|value|-|selected|+|text2|-|value2|-|selected2

    //readyState of 4 or 'complete' represents that data has been returned

    if (xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete'){

        //Gather the results from the callback

        var str = xmlHttp.responseText;

		var combo = ajaxdivname ;

		var lastOption = combo.options.length

        //Remove current Combo options

		for (i=0; i<lastOption; i++) {

			combo.options[0] = null;//The combo box re-organizes itself therefore remove the first element

		}

		//Populate combowith new items

		var optionArray = str.split('|+|');

		for (i in optionArray) {

			//alert(optionArray[i]);

			var opt = optionArray[i].split('|-|');

			combo.options[i] = new Option( opt[0], opt[1], opt[2] );

		}

    }

}

// XMLHttp send GET request

function xmlHttp_Get(xmlhttp, url) {

    xmlhttp.open('GET', url, true);

    xmlhttp.send(null);

}

// XMLHttp send GET request but wait for return;

function xmlHttp_Get_Synch(xmlhttp, url) {

    xmlhttp.open('GET', url, false);

    xmlhttp.send(null);

}

function GetXmlHttpObject(handler) {

    var objXmlHttp = null;    //Holds the local xmlHTTP object instance

    if (typeof(handler) != "function") {

      alert('Internal: GetXmlHttpObject called without a handler');

      return;

    }

        //Depending on the browser, try to create the xmlHttp object

    if (is_ie){

        //The object to create depends on version of IE

        //If it isn't ie5, then default to the Msxml2.XMLHTTP object

        var strObjName = (is_ie5) ? 'Microsoft.XMLHTTP' : 'Msxml2.XMLHTTP';

        //Attempt to create the object

        try{

            objXmlHttp = new ActiveXObject(strObjName);

            objXmlHttp.onreadystatechange = handler;

        }

        catch(e){

        //Object creation errored

            alert('IE detected, but object could not be created. Verify that active scripting and activeX controls are enabled');

            return;

        }

    }

    else if (is_opera){

        //Opera has some issues with xmlHttp object functionality

        alert('Opera detected. The page may not behave as expected.');

        return;

    }

    else{

        // Mozilla | Netscape | Safari

        objXmlHttp = new XMLHttpRequest();

        objXmlHttp.onload = handler;

        objXmlHttp.onerror = handler;

    }

    //Return the instantiated object

    return objXmlHttp;

}

//-->