var layerQueue=new Array()
var layerIndex=-1

/* hides <select> and <applet> objects (for IE only) */
function hideElement( elmID, overDiv )
{
  if( ie )
  {
        for( i = 0; i < document.getElementsByTagName( elmID ).length; i++ )
        {
          obj = document.getElementsByTagName( elmID )[i];
          if( !obj || !obj.offsetParent )
          {
                continue;
          }

          // Find the element's offsetTop and offsetLeft relative to the BODY tag.
          objLeft   = obj.offsetLeft;
          objTop    = obj.offsetTop;
          objParent = obj.offsetParent;

          while( objParent.tagName.toUpperCase() != "BODY" )
          {
                objLeft  += objParent.offsetLeft;
                objTop   += objParent.offsetTop;
                objParent = objParent.offsetParent;
          }

          objHeight = obj.offsetHeight;
          objWidth = obj.offsetWidth;

          if(( overDiv.offsetLeft + overDiv.offsetWidth ) <= objLeft );
          else if(( overDiv.offsetTop + overDiv.offsetHeight ) <= objTop );
          else if( overDiv.offsetTop >= ( objTop + objHeight ));
          else if( overDiv.offsetLeft >= ( objLeft + objWidth ));
          else
          {
                obj.style.visibility = "hidden";
          }
        }
  }
}

/*
* unhides <select> and <applet> objects (for IE only)
*/
function showElement( elmID )
{
  if( ie )
  {
        for( i = 0; i < document.getElementsByTagName( elmID ).length; i++ )
        {
          obj = document.getElementsByTagName( elmID )[i];

          if( !obj || !obj.offsetParent )
          {
                continue;
          }

          obj.style.visibility = "";
        }
  }
}

function lw_createLayer (layerName, top_pos, left_pos, width, height, bgcolor, bordercolor, z_index) {
        document.write("<div ONCLICK='event.cancelBubble=true' id='"+layerName+"' style='z-index:" + z_index + ";position:absolute;top:"+top_pos+";left:"+left_pos+";visibility:hidden;'><table bgcolor='"+bgcolor+"' style='border-width:0px;border-style:solid;border-color:" + bordercolor + "' cellpadding=2 cellspacing=0 width=0><tr><td valign=top width='"+width+"' height='"+height+"'><span id='"+layerName+"_content'></span></td></tr></table></div>")
}

function lw_getObj (objName) {
        return (dom)?document.getElementById(objName).style:ie?eval("document.all."+objName) :eval("document."+objName)
}

function lw_showLayer (layerName) {

        found=false
        for (i=0;i<=layerIndex;i++)
        {
                if (layerQueue[i]==layerName)
                {
                        found=true
                }
        }

        if ((lw_getObj(layerName).visibility!="visible")&&(lw_getObj(layerName).visibility!="show"))
        {
                lw_getObj(layerName).visibility = (dom||ie)?"visible":"show"
                layerQueue[++layerIndex] = layerName

                hideElement( 'SELECT', document.getElementById(layerName) );
                hideElement( 'APPLET', document.getElementById(layerName) );
        }
}

function lw_hideLayer () {
        showElement( 'SELECT', document.getElementById(layerQueue[layerIndex]) );
        showElement( 'APPLET', document.getElementById(layerQueue[layerIndex]) );

        lw_getObj(layerQueue[layerIndex--]).visibility = "hidden"
}

function lw_hideLayerName (layerName) {
        var i
        var tmpQueue=new Array()
        var newIndex=-1

        showElement( 'SELECT', document.getElementById(layerName) );
        showElement( 'APPLET', document.getElementById(layerName) );

        lw_getObj(layerName).visibility = "hidden"

        for (i=0;i<=layerIndex;i++)
        {
                if ((layerQueue[i]!="")&&(layerQueue[i]!=layerName))
                {
                        tmpQueue [++newIndex] = layerQueue[i]
                        hideElement( 'SELECT', document.getElementById(layerQueue[i]) );
                        hideElement( 'APPLET', document.getElementById(layerQueue[i]) );
                }

        }

        layerQueue = tmpQueue
        layerIndex = newIndex
}

function lw_closeAllLayers() {
        while (layerIndex >= 0)
        {
                lw_hideLayer()
        }
}

function lw_closeLastLayer() {
        if (layerIndex >= 0)
        {
                while ((lw_getObj(layerQueue[layerIndex]).visibility!="visible") && (layerIndex>0))
                {
                        layerIndex--;
                }
                lw_hideLayer()
        }
}

function lw_escLayer (e) {
        if (navigator.appName=="Netscape")
        {
                var keyCode = e.keyCode?e.keyCode:e.which?e.which:e.charCode;
                if ((keyCode==27)||(keyCode==1))
                {
                        lw_closeLastLayer()
                }
        }
        else
        if ((event.keyCode==0)||(event.keyCode==27))
        {
                lw_closeLastLayer()
        }
}


var lw_leftpos = 0
var lw_toppos = 0
var lw_width = 0
var lw_height = 0

function lw_calcpos(obj) {
        lw_leftpos=0
        lw_toppos=0
        lw_width = obj.offsetWidth
        lw_height = obj.offsetHeight

        var aTag = obj
        do {
                lw_leftpos += aTag.offsetLeft;
                lw_toppos += aTag.offsetTop;
                aTag = aTag.offsetParent;
        } while(aTag.tagName!="BODY");
}

document.onkeypress = lw_escLayer;
document.onclick = lw_closeAllLayers;