// Popup draggable window. Used for the Help system on EarthChem.
// EEJones January 2008. Script is loosely based on:
// Script Source: CodeLifter.com
// Copyright 2003
// Do not remove this header

isIE=document.all;
isNN=!document.all&&document.getElementById;
isN4=document.layers;
isHot=false;

function ddInit(e){
  topDog=isIE ? "BODY" : "HTML";
  whichDog=isIE ? document.all.helpLayer : document.getElementById("helpLayer");  
  hotDog=isIE ? event.srcElement : e.target;  
  while (hotDog.id!="titleBar"&&hotDog.tagName!=topDog){
    hotDog=isIE ? hotDog.parentElement : hotDog.parentNode;
  }  
  if (hotDog.id=="titleBar"){
    offsetx=isIE ? event.clientX : e.clientX;
    offsety=isIE ? event.clientY : e.clientY;
    nowX=parseInt(whichDog.style.left);
    nowY=parseInt(whichDog.style.top);
    ddEnabled=true;
    document.onmousemove=dd;
  }
}

function dd(e){
  if (!ddEnabled) return;
  whichDog.style.left=isIE ? nowX+event.clientX-offsetx : nowX+e.clientX-offsetx; 
  whichDog.style.top=isIE ? nowY+event.clientY-offsety : nowY+e.clientY-offsety;
  return false;  
}

function ddN4(whatDog){
  if (!isN4) return;
  N4=eval(whatDog);
  N4.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
  N4.onmousedown=function(e){
    N4.captureEvents(Event.MOUSEMOVE);
    N4x=e.x;
    N4y=e.y;
  }
  N4.onmousemove=function(e){
    if (isHot){
      N4.moveBy(e.x-N4x,e.y-N4y);
      return false;
    }
  }
  N4.onmouseup=function(){
    N4.releaseEvents(Event.MOUSEMOVE);
  }
}

function hideMe(){
  if (isIE||isNN) whichDog.style.visibility="hidden";
  else if (isN4) document.helpLayer.visibility="hide";
}

function showMe(){
  if (isIE||isNN) whichDog.style.visibility="visible";
  else if (isN4) document.helpLayer.visibility="show";
}

/* This function was replaced by the same-named script in the file earthchem-help-changeContent.js which is generated by the admin_help.php file (when an administrator pushes a button), creating the script dynamically from the table 'help' which contains title/content/location for every help topic.
 
function changeContent(content) {
document.getElementById('TitleText').innerHTML=content;
var thisContent
if (content == 'topic1') {
thisContent = 'topic1 content'
} else if (content == 'topic2') {
thisContent = 'topic2 content' 
} else {
thisContent = 'help content not found'
}
document.getElementById('TitleText').innerHTML=thisContent;
}*/

// experimenting... Eileen this is not part of the original help system, I am trying something for EC so Doug can edit help
function changeTheContent(content) {
document.getElementById('TitleText').innerHTML=content;
}

document.onmousedown=ddInit;
document.onmouseup=Function("ddEnabled=false");

function showHelp(topic) {
changeContent(topic)
showMe()
}

//experimenting
function testshowHelp(topic) {
changeTheContent(topic)
showMe()
}