var bName = navigator.appName;
var bVer = parseInt(navigator.appVersion);

var NS6 = (bName == "Netscape" && bVer >=5 && bVer < 7); //alternativa check su getElementById
var NS4 = document.layers;
var IE4 = document.all;

//LAYER SWITCHING CODE

     if (NS4) {
       layerStyleRef="layer.";
       layerRef="document.layers[";
       styleSwitch="]"; layerDoc=".document."
     }
	 else if (IE4) {
        layerStyleRef="layer.style.";
        layerRef="document.all[";
        styleSwitch="].style"; layerDoc=".";
     }
	 else if (NS6) { 
       layerStyleRef="style.";
       layerRef="document.getElementById(";
       styleSwitch=").style"; layerDoc=".";
     }	
     else {
		//vedi un po' tu che vuoi fare. Se uno ha un browser per conto suo?
     }

	 menutop = new Array ()
menutop[0]="menuopenso";
menutop[1]="menuopenco";
menutop[2]="menuopenlp";
menutop[3]="menuopenbp";
menutop[4]="Pmenuopenso";
menutop[5]="Pmenuopenpo";
menutop[6]="Pmenuopenbp";
 
function showLayer(layerName){
        if (NS4 || IE4 || NS6) {
                eval(layerRef+'"'+layerName+'"'+styleSwitch+'.visibility="visible"');
        }       
}
        
   function hideLayer(layerName){
        if (NS4 || IE4 || NS6) {
                eval(layerRef+'"'+layerName+'"'+styleSwitch+'.visibility="hidden"');
                }       
        }
		
		function hideAll () {
	for (i_loc=0; i_loc < menutop.length; i_loc ++) {
		hideLayer (menutop[i_loc]);
	}return false;
}



function setVariables(){
if (navigator.appName == "Netscape") {
if (parseInt(navigator.appVersion) >= 5){v=".top=";h=".left=";dS="document.getElementById(\"";sD="\").style";
y="window.pageYOffset";x="window.pageXOffset";}
else {v=".top=";h=".left=";dS="document.";sD="";
y="window.pageYOffset";x="window.pageXOffset";}
}
else {h=".pixelLeft=";v=".pixelTop=";dS="";sD=".style";
y="document.body.scrollTop";x="document.body.scrollLeft";}checkLocationA();checkLocationB()}
movex=0,movey=0,xdiff=0,ydiff=0,ystart=0,xstart=0
function checkLocation(){
objecta="object1";yy=eval(y);xx=eval(x);ydiff=ystart-yy;xdiff=xstart-xx;
if ((ydiff<(-1))||(ydiff>(1))) movey=Math.round(ydiff/10),ystart-=movey
if ((xdiff<(-1))||(xdiff>(1))) movex=Math.round(xdiff/10),xstart-=movex
if (ystart>=1){eval(dS+objecta+sD+v+(ystart+10));
} else {eval(dS+objecta+sD+v+1);}

eval(dS+objecta+sD+h+xstart);
setTimeout("checkLocation()",10);
}

function checkLocationA(){ystart=eval(y);xstart=eval(x);}

function checkLocation1(){
objectb="object2";yy=eval(y);xx=eval(x);ydiff=ystart-yy;xdiff=xstart-xx;
if ((ydiff<(-1))||(ydiff>(1))) movey=Math.round(ydiff/10),ystart-=movey
if ((xdiff<(-1))||(xdiff>(1))) movex=Math.round(xdiff/10),xstart-=movex
if (ystart>=1){eval(dS+objectb+sD+v+(ystart+10));
} else {eval(dS+objectb+sD+v+1);}

eval(dS+objectb+sD+h+xstart);
setTimeout("checkLocation1()",10);
}

function checkLocationB(){ystart=eval(y);xstart=eval(x);}