GRRRRRRRRR, need help with rollover please

beenworking on this for two days, want the mouse to roll over the pic, then a larger pic pop up, and when the mouse is not on the pic, no large pic is there…
Using this, there is something wrong, no mouse rollover popup----any help ?

<HEAD>
<SCRIPT LANGUAGE=“JavaScript”>
<!-- Begin
image1 = new Image();
image1.src = “http://www.mywebsite.com/image2/85.jpg”;
// End -->
</script>
</HEAD>

<BODY>
<a href=“http://www.mywebsite.com/sellsheet/85.html” onmouseover=“image1.src=‘http://www.mywebsite.com/image2/85.jpg’;”
onmouseout=“image1.src=‘http://www.mywebsite.com/image/85.jpg’;”>
<img name=“image1” src=“http://www.mywebsite.com/image/85.jpg” border=0></a>
</BODY>