Эффект открытия страницы (горизонтальные створки)

<STYLE>
<!--
.sb{
position:absolute;
left:0;
top:0;
layer-background-color:blue;
background-color:blue;
border:0.1px solid blue
}
-->
</STYLE>

<DIV ID="i1" CLASS="sb"></div><DIV ID="i2" CLASS="sb"></div>
<SCRIPT language="JavaScript1.2">
var speed=10
var temp=new Array()
var temp2=new Array()
if (document.layers){
for (i=1;i<=2;i++){
temp[i]=eval("document.i"+i+".clip")
temp2[i]=eval("document.i"+i)
temp[i].width=window.innerWidth
temp[i].height=window.innerHeight/2
temp2[i].top=(i-1)*temp[i].height
}
}
else if (document.all){
var clipbottom=document.body.offsetHeight/2,cliptop=0
for (i=1;i<=2;i++){
temp[i]=eval("document.all.i"+i+".style")
temp[i].width=document.body.clientWidth
temp[i].height=document.body.offsetHeight/2
temp[i].top=(i-1)*parseInt(temp[i].height)
}
}

function openit(){
window.scrollTo(0,0)
if (document.layers){
temp[1].bottom-=speed
temp[2].top+=speed
if (temp[1].bottom<=0)
clearInterval(stopit)
}
else if (document.all){
clipbottom-=speed
temp[1].clip="rect(0 auto+"+clipbottom+" 0)"
cliptop+=speed
temp[2].clip="rect("+cliptop+" auto auto)"
if (clipbottom<=0)
clearInterval(stopit)
}
}
function gogo(){
stopit=setInterval("openit()",50)
}
gogo()

</SCRIPT>