/*
 *      Copyright (c) 2007-2010, Institute of Computing (IC) at the University
 *      of Campinas (UNICAMP) and Nucleus of Informatics Applied to Education
 *      (NIED) at UNICAMP
 *      All rights reserved.
 *      
 *      Redistribution and use in source and binary forms, with or without
 *      modification, are permitted provided that the following conditions are
 *      met:
 *      
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *      * Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following disclaimer
 *        in the documentation and/or other materials provided with the
 *        distribution.
 *      * Neither the name of the  nor the names of its
 *        contributors may be used to endorse or promote products derived from
 *        this software without specific prior written permission.
 *      
 *      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *      "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *      LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *      A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *      OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *      LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *      THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *      OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

var deltaX ;
var deltaY ;
var pressed = false ;
var minimized = new Array() ;
var counter = 0 ;

function drag( event ){
  // Cross browser event detection
  var target ;
  if( !event ){
    event = windows.event ;
  }
  if( !event.target ){
    event.target = event.srcElement ;
  }
   
  try{
    // User clicks on the h3, but we manipulate the parent div
    var obj = document.getElementById( event.target.parentNode.id ) ; 
    obj.style.left = obj.offsetLeft + "px" ;
    obj.style.top = obj.offsetTop + "px" ; 

    deltaX = event.clientX ;
    deltaY = event.clientY ;
    pressed = true ;
  }
  catch( e ){}
}

function move( event ){
  // If the mouse is not pressed, then finish
  if( pressed == false ){
    return ;
  }
  // Cross browser event detection
  var target ;
  if( !event ){
    event = windows.event ;
  }
  if( !event.target ){
    event.target = event.srcElement ;
  }

  try{
    // User clicks on the h3, but we manipulate the parent div
    var obj = document.getElementById( event.target.parentNode.id ) ; 
    obj.style.left = obj.offsetLeft + ( event.clientX - deltaX ) + "px" ;
    obj.style.top = obj.offsetTop + ( event.clientY - deltaY ) + "px" ;
    deltaX = event.clientX ;
    deltaY = event.clientY ;
  }
  catch( e ){}
}

function drop( event ){
  pressed = false ;
  
  // Cross browser event detection
  var target ;
  if( !event ){
    event = windows.event ;
  }
  if( !event.target ){
    event.target = event.srcElement ;
  }  
}

function close( id ){
  var obj = document.getElementById( id ) ;
  //obj.style.display = "none" ;
  obj.style.visibility = "hidden" ;
  position--;
  atualizarConversas();
}

function minimize( id ){
  var JanelaMax = document.getElementById( id ) ;
  var JanelaMin = document.getElementById(id+"TitleChat") ;
  JanelaMax.style.visibility="hidden";	
  JanelaMin.style.visibility="visible";
}

function maximize( id ){
  var JanelaMax = document.getElementById( id ) ;
  var JanelaMin = document.getElementById(id+"TitleChat") ;
  JanelaMax.style.visibility="visible";	
  JanelaMin.style.visibility="hidden";
}