if (parseInt(navigator.appVersion)>= 4)
  {
    if (navigator.appName == "Netscape")
    {
        layerStyleRef="layer.";
        layerRef="document.layers";
        styleSwitch="";
    }
    else
    {
    layerStyleRef="layer.style.";
    layerRef="document.all";
    styleSwitch=".style";
    }
}

function show(layerName)
{
	
	if (parseInt(navigator.appVersion)>= 4)
	{
		//eval(layerRef+'["text30"]'+styleSwitch+'.visibility="hidden"');
		//eval(layerRef+'["im50"]'+styleSwitch+'.visibility="hidden"');
		//eval(layerRef+'["im70"]'+styleSwitch+'.visibility="hidden"');
		//eval(layerRef+'["im90"]'+styleSwitch+'.visibility="hidden"');
		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
    }
}

function cls(layerName){
	if (parseInt(navigator.appVersion)>= 4) 
	{
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
	}
}

function imgpos(objId, divId){
	var elemPos = document.getElementById(objId);
	var elemDiv = document.getElementById(divId);
	var x = 0, y = 0; 
    if (elemPos && elemPos.offsetParent) { 
        while (elemPos) { 
            x += elemPos.offsetLeft; 
            y += elemPos.offsetTop; 
            elemPos = elemPos.offsetParent; 
        } 
    }
	elemDiv.style.top = y - 27;
	elemDiv.style.left= x - 20;
}