isDOM = ( (parseInt(navigator.appVersion) >= 5) || (navigator.appVersion.indexOf("MSIE 5") != -1)  ) ? 1 : 0;
isNS4 = (document.layers) ? 1 : 0;
isIE4 = (document.all) ? 1 : 0;

function checkBrowserVersion(){
var x = navigator.appVersion;
y = x.substring(0,4);
if (y>=4) setVariables(),checkLocation();
}

function setVariables() {
if (isNS4) {
v = ".top=";
h = ".left=";
dS = "document.";
sD = "";
y = "window.pageYOffset";
x = "window.pageXOffset";
iW = "window.innerWidth";
iH = "window.innerHeight";
}

else {
h = ".pixelLeft=";
v = ".pixelTop=";
dS = "";
sD = ".style";
y = "document.body.scrollTop";
x = "document.body.scrollLeft";
iW = "document.body.clientWidth";
iH = "document.body.clientHeight";
}
innerX = eval(iW) - 110; // change the distance from the side of the window
innerY = eval(iH) - 85; // change the distance from the bottom of the window
object = "toparrow";
checkLocationA();
}
movex = 0;
movey = 0;
xdiff = 0;
ydiff = 0;
ystart = 0;
xstart = 0;

function checkLocation() {
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;
eval(dS + object + sD + v + (ystart + innerY));
eval(dS + object + sD + h + (xstart + innerX));
setTimeout("checkLocation()", 5);
}

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