i'm not really sure about the question but here's my try. there's something called preloading images, which is caching the image in the web browser's cache before the graphic is actually called onmouseover. here's the code from macromedia dreamweaver...
<script language="JavaScript">
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[ i ].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[ i ];}}
}
</script>
<body bgcolor="#FFFFFF" text="#000000" onLoad="MM_preloadImages('a','b')">
where a and b in the <body> tag are the graphics you want to preload. note that the above [ i ] has to make spaces because this forums interprets it as italics... remove the spaces.
maybe...
<<I Come And Go All The Time>><P ID="edit"><FONT SIZE=-1><EM>Edited by machow on 11/09/01 10:16 AM.</EM></FONT></P>