Netscape kompatibilitetsprob - HASTER !!!

Hvorfor virker følgende script IKKE i Netscape???

function setVariables() {
imgwidth=65;  // logo bredde, i pixels
imgheight=74;  // logo højde, i pixels
if (navigator.appName == \"Netscape\") {
horz=\".left\";
vert=\".top\";
docStyle=\"document.\";
styleDoc=\"\";
innerW=\"window.innerWidth\";
innerH=\"window.innerHeight\";
offsetX=\"window.pageXOffset\";
offsetY=\"window.pageYOffset\";
}
else {
horz=\".pixelLeft\";
vert=\".pixelTop\";
docStyle=\"\";
styleDoc=\".style\";
innerW=\"document.body.clientWidth\";
innerH=\"document.body.clientHeight\";
offsetX=\"document.body.scrollLeft\";
offsetY=\"document.body.scrollTop\";
  }
}
function checkLocation() {
objectXY=\"logo\";
var availableX=eval(innerW);
var availableY=eval(innerH);
var currentX=eval(offsetX);
var currentY=eval(offsetY);
x=(availableX-610)/2+610-(imgwidth)+currentX;
y=availableY-(imgheight+20)+currentY;
evalMove();
setTimeout(\"checkLocation()\",10);
}
function evalMove() {
eval(docStyle + objectXY + styleDoc + horz + \"=\" + x);
eval(docStyle + objectXY + styleDoc + vert + \"=\" + y);
}