var buttonActionEnabled = false;
var savedStates = new Array();
var savedStateCount = 0;
 
function saveBackgroundStyle(myElement)
{
  saved=new Object();
  saved.element=myElement;
  saved.className=myElement.className;
  saved.backgroundColor=myElement.style["backgroundColor"];
  return saved;
}
 
function restoreBackgroundStyle(savedState)
{
  savedState.element.style["backgroundColor"]=savedState.backgroundColor;
  if (savedState.className)
  {
    savedState.element.className=savedState.className;
  }
}
 
function findNode(startingNode, tagName)
{
  myElement=startingNode;
  var i=0;
  while (myElement && (!myElement.tagName || (myElement.tagName && myElement.tagName!=tagName)))
  {
    myElement=startingNode.childNodes[i];
    i++;
  }
  if (myElement && myElement.tagName && myElement.tagName==tagName)
  {
    return myElement;
  }
  else if (startingNode.firstChild)
    return findNode(startingNode.firstChild, tagName);
  return 0;
}
 
function highlightTableRow(myElement, highlightColor)
{
  var i=0;
  for (i; i<savedStateCount; i++)
  {
    restoreBackgroundStyle(savedStates[i]);
  }
  savedStateCount=0;
  while (myElement && ((myElement.tagName && myElement.tagName!="TR") || !myElement.tagName))
  {
    myElement=myElement.parentNode;
  }
  while(myElement && myElement.className && myElement.className.indexOf("highlightParent")>=0)
  {
      myElement=myElement.parentNode;
      while (myElement && ((myElement.tagName && myElement.tagName!="TR") || !myElement.tagName))
      {
        myElement=myElement.parentNode;
      }
  }
  if (!myElement || (myElement && myElement.className && myElement.className.indexOf("disableHighlight")>=0) )
    return;
  if (myElement)
  {
    var tableRow=myElement;
    if (tableRow)
    {
      savedStates[savedStateCount]=saveBackgroundStyle(tableRow);
      savedStateCount++;
    }
    var tableCell=findNode(myElement, "TD");
    var i=0;
    while (tableCell)
    {
      if (tableCell.tagName=="TD")
      {
        if (!tableCell.style)
        {
          tableCell.style={};
        }
        else
        {
          savedStates[savedStateCount]=saveBackgroundStyle(tableCell);
          savedStateCount++;
        }
        tableCell.style["backgroundColor"]=highlightColor;
        tableCell.style.cursor='default';
        i++;
      }
      tableCell=tableCell.nextSibling;
    }
  }
}
 
function trackTableHighlight(mEvent, highlightColor)
{
  if (!mEvent)
    mEvent=window.event;
  if (mEvent.srcElement)
  {
    highlightTableRow( mEvent.srcElement, highlightColor);
  }
  else if (mEvent.target)
  {
    highlightTableRow( mEvent.target, highlightColor);
  }
}