function show_comment(the_id){
	var show_id_str = "cmnt_full_"+the_id;
	var hide_id_str = "cmnt_pre_"+the_id;
	document.getElementById(show_id_str).style.display="block";
	document.getElementById(hide_id_str).style.display="none";
}
function hide_comment(the_id){
	var show_id_str = "cmnt_pre_"+the_id;
	var hide_id_str = "cmnt_full_"+the_id;
	document.getElementById(show_id_str).style.display="block";
	document.getElementById(hide_id_str).style.display="none";
}
function show_comm_form(the_id){
	document.getElementById("add_comment_button_"+the_id).style.display="none";
	document.getElementById("comm_form_"+the_id).style.display="block";
}
function hide_comm_form(the_id){
	document.getElementById("add_comment_button_"+the_id).style.display="block";
	document.getElementById("comm_form_"+the_id).style.display="none";
}
function close_warning(){
	document.getElementById("warning").style.display="none";
}
function record_rating(the_rating,c_id,r_id){

	xmlhttp=null;
	if (window.XMLHttpRequest){// code for all new browsers
	
	  xmlhttp=new XMLHttpRequest();
	
	}else if (window.ActiveXObject){// code for IE5 and IE6
	
	  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	
	}
	
	if (xmlhttp!=null){
		var url = "record_rating.php?c="+c_id+"&r="+r_id+"&rat="+the_rating; 
		xmlhttp.onreadystatechange=state_Change(the_rating);
		xmlhttp.open("GET",url,true);
/*		// for testing...
		xmlhttp.onreadystatechange=function() {
		   if (xmlhttp.readyState==4) {
			   var testwin = window.alert(xmlhttp.responseText);
		   }
		}
*/		
		xmlhttp.send(null);
		var new_img = "<img src='/images/rating/"+the_rating+"-stars.gif' width='74' height='14' border='0' id='stars'> <div id='status_report' style='display:inline;'></div>";
		document.getElementById("star_div").innerHTML = new_img;
		document.getElementById("status_report").innerHTML = "<em>Recorded</em>";
	}else{
	
	  alert("Your browser does not support XMLHTTP.");
	
	}

}
function state_Change(the_rating){

	if (xmlhttp.readyState==4){// 4 = "loaded"
	
		window.alert("state_Change 4");
	 
		 if (xmlhttp.status==200){// 200 = OK
		 
		 }else{
			window.alert("Problem retrieving XML data");
		 
		 }
	 
	}
}
//
// scripts for resources "send to a colleague" box
//

function show_box(box,trigger){
//	window.alert("box: "+box+", trigger: "+trigger);

	var box_left_offset = -250;
	var box_top_offset = 40;

	var the_trigger = trigger;
	var trig_left = trig_top = 0;
	var trig_width = parseInt(the_trigger.offsetWidth);
	
	while(the_trigger != null){
		trig_left += the_trigger.offsetLeft;
		trig_top += the_trigger.offsetTop;
		the_trigger = the_trigger.offsetParent;
	}
	var the_box = document.getElementById(box);
	
	the_box.style.display = "block";
	var box_width = parseInt(the_box.offsetWidth);
	
	var new_x = trig_left + box_left_offset;
	var new_y = trig_top + box_top_offset;
	
	if(box == "tell_a_friend_box"){
		box_top_offset = box_width - trig_width;
	}
		
	the_box.style.top = new_y + "px";
//	the_box.style.left = "500px";
	the_box.style.left = new_x + "px";
//	window.alert("trig_width: "+trig_width+"; trig_left: "+ trig_left +"; x: "+new_x + "; Y: "+new_y);
	document.getElementById('send_btn').focus();
}

function hide_box(box){
	var the_box = document.getElementById(box);
	var the_content = document.getElementById("friend_content");
	the_box.style.display = "none";
	the_content.innerHTML = "<h3 style='margin:0 0 5px; 0;'>Send to a Colleague</h3>  <form onSubmit=\"sendFriend()\" id='friend_form' action='javascript:;'>  <div><label for='s_name'>Your Name</label> <input type='text' name='s_name' id='s_name' ></div>  <div><label for='s_email'>Your Email</label> <input type='text' name='s_email' id='s_email' ></div>  <div><label for='f_name'>Colleague's Name</label> <input type='text' name='f_name' id='f_name' ></div>  <div><label for='f_email'>Colleague's Email</label> <input type='text' name='f_email' id='f_email' ></div>  <label for='msg'>Message</label><br />  <textarea id='msg' name='msg' style='width:300px;height:50px;'></textarea><br />  <input type='submit' value='Send Message' id='send_btn'>  </form>";
}

function sendRequest(url,callback,postData) {
	var req = createXMLHTTPObject();
	if (!req) return;
	var method = (postData) ? "POST" : "GET";
	req.open(method,url,true);
	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
	if (postData)
		req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	req.onreadystatechange = function () {
		if (req.readyState != 4) return;
		if (req.status != 200 && req.status != 304) {
//			alert('HTTP error ' + req.status);
			return;
		}
		callback(req);
	}
	if (req.readyState == 4) return;
	req.send(postData);
}

var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++) {
		try {
			xmlhttp = XMLHttpFactories[i]();
		}
		catch (e) {
			continue;
		}
		break;
	}
	return xmlhttp;
}
function handleFriend(req) {
	var writeroot = document.getElementById("friend_content");
	writeroot.innerHTML = req.responseText;
}

function sendFriend(){
	the_form = document.getElementById("friend_form");
	var s_name = the_form.elements["s_name"].value;
	var s_email = the_form.elements["s_email"].value;
	var f_name = the_form.elements["f_name"].value;
	var f_email = the_form.elements["f_email"].value;
	var msg = the_form.elements["msg"].value;
	var the_rsrc = the_form.elements["the_rsrc"].value;
	var rqst_link = "/resources/send_friend.php";
	var postData = "s_name="+s_name+"&s_email="+s_email+"&f_name="+f_name+"&f_email="+f_email+"&msg="+msg+"&the_rsrc="+the_rsrc;
	sendRequest(rqst_link,handleFriend,postData);
	
}