// global variables

var newsletterRequest = false;

var newsletterURL = "";

var loadingDiv="";

var formDiv="";

var alpha = 1;



//submit the form via ajax

function makeRequest(parameters) {

  createRequestObject();

  newsletterRequest.setVar("email", parameters["email"]);

  newsletterRequest.setVar("newsletter", parameters["newsletter"]);

  newsletterRequest.method = 'GET';

  newsletterRequest.element = formDiv;

  newsletterRequest.onCompletion = alertContents;

  newsletterRequest.runAJAX();

}



//create the communication object

function createRequestObject() {

	newsletterRequest = new sack(newsletterURL);

}



//act on the server response

function alertContents() {

	FadeIn();
	
	
	
	var obj1 = document.getElementById("ajaxNewsletter");
		if ((obj1.childNodes.length>0) && (obj1.childNodes[0].className=="success")) {
		  var obj = document.getElementById("newsletterFormDiv");
		  for (i=0; i<obj.childNodes.length; i++) {
			  
			 if (obj.childNodes[i].tagName == "INPUT") {
				if (obj.childNodes[i].type == "text") {
					obj.childNodes[i].disabled = "true";
					obj.childNodes[i].style.border = "0px solid #000000";
					obj.childNodes[i].style.display = "none";
				}
			}
			if (obj.childNodes[i].type == "submit") {
				obj.childNodes[i].style.display = "none";
			}
		  }
	}
}



//prints the server response

function printResponse(){

  alert(http_request.responseText);

  var response = http_request.responseXML.documentElement;

  var n = response.getElementsByTagName('result')[0].firstChild.nodeValue;

  

  message= response.getElementsByTagName('message')[0].firstChild.nodeValue;

  document.getElementById(formDiv).innerHTML = "message";
  

}



//fade out the form

function StartFade(url,fdiv,ldiv) {

   newsletterURL = url;

   formDiv = fdiv;

   loadingDiv = ldiv;

   tStart   = new Date();

   showDiv();

   timerID  = setTimeout("FadeOut()", 100);

}



//handles the fadeout of the formDiv element

function FadeOut(){

  alpha -= 0.1;

  if(alpha < 0){

    alpha = 0;

    get();

  }else{

    obj = document.getElementById(formDiv);

    setOpacity(obj, alpha);

    setTimeout("FadeOut()", 100);

  }

}



//handles the fadein of the formDiv element

function FadeIn(){

  alpha += 0.1;

  if(alpha > 1){

    hideDiv();

    alpha = 1;

  }else{

    obj = document.getElementById(formDiv);

    setOpacity(obj, alpha);

    setTimeout("FadeIn()", 100);

  }

}



//gets the values inserted in the newsletterFormDiv

function get() {

  var obj = document.getElementById("newsletterFormDiv");

  

  var getstr = "?";

  var params = new Array();

  for (i=0; i<obj.childNodes.length; i++) {

     if (obj.childNodes[i].tagName == "INPUT") {

        if (obj.childNodes[i].type == "text") {

           //getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";

           params[obj.childNodes[i].name] = obj.childNodes[i].value;

           

        }

        if (obj.childNodes[i].type == "checkbox") {

           if (obj.childNodes[i].checked) {

              //getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";

              params[obj.childNodes[i].name] = obj.childNodes[i].value;

           } else {

              //getstr += obj.childNodes[i].name + "=&";

              params[obj.childNodes[i].name] = "";

           }

        }

        if (obj.childNodes[i].type == "radio") {

           if (obj.childNodes[i].checked) {

              //getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";

              params[obj.childNodes[i].name] = obj.childNodes[i].value;

           }

        }

        if (obj.childNodes[i].type == "hidden") {

           //getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";

           params[obj.childNodes[i].name] = obj.childNodes[i].value;

        }

     }   

     if (obj.childNodes[i].tagName == "SELECT") {

        var sel = obj.childNodes[i];

        //getstr += sel.name + "=" + sel.options[sel.selectedIndex].value + "&";

        params[sel.name] = sel.options[sel.selectedIndex].value;

     }

     

  }

  makeRequest(params);

}



//shows a div for progress information

function showDiv(){

	/*

  if (document.getElementById) { // DOM3 = IE5, NS6

		document.getElementById(loadingDiv).style.display = 'block';

	}

	else {

		if (document.layers) { // Netscape 4

			document.loadingDiv.display = 'block';

		}

		else { // IE 4

			document.all.loadingDiv.style.display = 'block';

		}

	}*/

}



//hides a div with the progress information

function hideDiv(){
	
	if (document.getElementById) { // DOM3 = IE5, NS6

		document.getElementById(loadingDiv).style.display = 'none';

	}

	else {

		if (document.layers) { // Netscape 4

			document.loadingDiv.display = 'none';

		}

		else { // IE 4

			document.all.loadingDiv.style.display = 'none';

		}

	}

}



/*

* Function to put the new input in the document

*/

function setOuterHTML(element, toValue)

{

	if (typeof(element.outerHTML) != 'undefined')

		element.outerHTML = toValue;

	else

	{

		var range = document.createRange();

		range.setStartBefore(element);

		element.parentNode.replaceChild(range.createContextualFragment(toValue), element);

	}

}		



/**

Method:       setOpacity(HTMLElement, Int)

Description:  Sets the opacity of an element

Parameters:

     HTMLElement aElm  - The HTML element to set the opacity for

     Float aOpac       - The value for the element's opacity. 0.0 - 1.0

                         Where 0.0 is invisible and 1.0 is completely 

                         visible

*/

function setOpacity(aElm,aOpac) {

    var object = aElm.style; 

    object.opacity = (aOpac ); 

    object.MozOpacity = (aOpac ); 

    object.KhtmlOpacity = (aOpac ); 

    object.filter = "alpha(opacity=" + aOpac*100 + ")"; 



}