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?
     }



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()}
movex=0,movey=0,xdiff=0,ydiff=0,ystart=0,xstart=0
function checkLocation(){
object="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>=160){eval(dS+object+sD+v+(ystart+10));
} else {eval(dS+object+sD+v+160);}


eval(dS+object+sD+h+xstart);
setTimeout("checkLocation()",100);
}

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