function createHTTPObject() { 
   var req;
   if(window.XMLHttpRequest){ 
      // Firefox, Safari, Opera... 
      req = new XMLHttpRequest(); 
   } else if(window.ActiveXObject) { 
      // Internet Explorer 5+ 
      req = new ActiveXObject("Microsoft.XMLHTTP"); 
   } else { 
      alert('Problem creating the XMLHttpRequest object'); 
   } 
   return req; 
} 

var current_button = null;

function changeItem(irw,pid) {
	var br = sChangeContentBoth(irw);
	var rb = replaceButton(pid);
}

// function changeItem(irw,pid) {
// 	var rb = replaceButton(pid);
//	var lr = sChangeContentLeft(irw);
//	var rr = sChangeContentRight(irw);
// }


function replaceButton(pid) {
	if(current_button!=null) {
		var on = current_button + '_on';
		var off = current_button;

		document.getElementById(on).style.display='none';
		document.getElementById(off).style.display='block';
	}

	var on = pid + '_on';
	var off = pid;
	document.getElementById(off).style.display='none';
	document.getElementById(on).style.display='block';

	current_button = pid;
	
	return null;
}

function sChangeContentBoth(irw) {
	var url = (!irw) ? '/publications/content/both/' : '/publications/content/both/'+irw+'/';
	var result = doReplace(url,'BothContent');
	return null;
}

function sChangeContentLeft(irw) {
	var url = (!irw) ? '/publications/content/left/' : '/publications/content/left/'+irw+'/';
	var result = doReplace(url,'LeftContent');
   	return null;
}

function sChangeContentRight(irw) {
	var url = (!irw) ? '/publications/content/right/' : '/publications/content/right/'+irw+'/';
	var result = doReplace(url,'RightContent');
   	return null;
}

function doReplace(url,id) {
	var http = createHTTPObject();
	http.open('get',url);
   	http.onreadystatechange = function() {
		if (http.readyState == 4 && http.status == 200) { 
      		var response = http.responseText;
      		// alert('response:' + response);
      		if(response) { 
				document.getElementById(id).innerHTML = http.responseText; 
      		}
   		} 
	} 
   	http.send(null);
   	
   	return null;
}

function orderWindow() {
	var orderWindow;
	orderWindow = window.open('/publications/order/','pub_order','width=670,height=680')
}

function orderWindowClose() {
	var test = confirm('Are you sure you want to cancel?  Any information you have provided will be lost.');
	if(test) {
		window.close();
	}
}