var isMinNS4=(navigator.appName.indexOf("Netscape")>=0&&parseFloat(navigator.appVersion)>=4)?1:0;
var isMinIE4=(document.all)?1:0;
var isMinIE5=(isMinIE4&&navigator.appVersion.indexOf("5.")>=0)?1:0;


var pop_up_menus=0;
var pop_up_menus_instances = new Array();

 function getLayer(name){if(isMinNS4)return findLayer(name,document);if(isMinIE4)return eval('document.all.'+name);return null;}
 function MoveLayerTo(layer,x,y) { if(isMinNS4) { layer.moveTo(x,y); } if(isMinIE4) { layer.style.left=x;layer.style.top=y; } }
 function HideLayer(layer){if(isMinNS4)layer.visibility="hide";if(isMinIE4)layer.style.visibility="hidden";}
 function ShowLayer(layer) { if(isMinNS4)layer.visibility="show"; if(isMinIE4)layer.style.visibility="visible"; }
 function getPageWidth(){if(isMinNS4)return document.width;if(isMinIE4)return document.body.scrollWidth;return-1;}
 function getWidth(layer){if(isMinNS4){if(layer.document.width)return layer.document.width;else return layer.clip.right-layer.clip.left;}if(isMinIE4){if(layer.style.pixelWidth)return layer.style.pixelWidth;else return layer.clientWidth;}return-1;}
 function getHeight(layer){if(isMinNS4){if(layer.document.height)return layer.document.height;else return layer.clip.bottom-layer.clip.top;}if(isMinIE4){if(layer.style.pixelHeight)return layer.style.pixelHeight;else return layer.clientHeight;}return-1;}
 function getLeft(layer){if(isMinNS4)return layer.left;if(isMinIE4)return layer.style.pixelLeft;return-1;}
 function getTop(layer){if(isMinNS4)return layer.top;if(isMinIE4)return layer.style.pixelTop;return-1;}
 function getRight(layer){if(isMinNS4)return layer.left+getWidth(layer);if(isMinIE4)return layer.style.pixelLeft+getWidth(layer);return-1;}
 function getBottom(layer){if(isMinNS4)return layer.top+getHeight(layer);if(isMinIE4)return layer.style.pixelTop+getHeight(layer);return-1;}
 

function PopUpMenu()
{
    this.width      = 100;
    this.posx       = 0;
    this.posy       = 0;
    this.items      = new Array();
    this.item_count = 0;
    this.created    = false;
    this.index      = pop_up_menus++;
    this.style      = "";
    this.backcolor  = "#FFFFFF";
    this.textcolor  = "#000000";
    this.open_func  = "";
    this.base_layer = null;

    this.AddItem = PM_AddItem;
    this.Create  = PM_Create;
    this.Open    = PM_Open;
    this.ReOpen  = PM_ReOpen;
    this.Close   = PM_Close;

    pop_up_menus_instances[pop_up_menus-1] = this;
    return this;
}

function PM_AddItem(item_text,item_href,href_type)
{
    this.item_count++;
    this.items[this.item_count-1]= new Array(item_text,item_href,href_type);
}

function PM_Create()
{
    if (this.style!="") class_str = "class='"+this.style+"'";  else class_str="";

    str  = "<div id='_menu_"+this.index+"' style='position:absolute; width:"+this.width+"'><table "+class_str+" bgcolor='"+this.backcolor+"' cellpadding=2 cellspacing=0 width='100%' height='100%'><tr><td>";
    for (i=0;i<this.item_count;i++)
    {
         str  = str + "<a href='"+this.items[i][1]+"' style='color:"+this.textcolor+"'>"+this.items[i][0]+"</a><br>";
    }
    str  = str + "</td></tr></table></div>";

    if(isMinNS4) 
  	{
  		this.base_layer = new Layer(this.width);
  	}
		
  	if(isMinIE4)
  	{
  		document.body.insertAdjacentHTML("beforeEnd",str);
  		this.base_layer = getLayer("_menu_"+this.index);
   	}

    HideLayer(this.base_layer);
    this.base_layer.onmouseout=PM_MenuOff;
    this.base_layer.index = this.index;
}

function PM_Open(x,y)
{
   this.posx = x;
   this.posy = y;
   MoveLayerTo(this.base_layer, this.posx,this.posy);
   ShowLayer(this.base_layer);
}

function PM_ReOpen()
{
   MoveLayerTo(this.base_layer,this.posx,this.posy);
   ShowLayer(this.base_layer);
}

function PM_Close()
{
   HideLayer(this.base_layer);
}

function PM_MenuOff(e)
{
  var menu = pop_up_menus_instances[this.index];

	if(isMinIE4)
	{
		mouseX=window.event.clientX+document.body.scrollLeft;
		mouseY=window.event.clientY+document.body.scrollTop;
  }
    if(!(mouseX>getLeft(this) && mouseX<getRight(this) && mouseY>getTop(this) && mouseY<getBottom(this)))
      HideLayer(this);
}