Demo
<script>
var width=document.body.clientWidth;
var height=document.body.clientHeight;
function doClickText(who,type,step,timeOut) {
document.getElementById(who).style.display="none";
if(type==0) {
reveal('revealDiv1',step,timeOut,0);
reveal('revealDiv2',step,timeOut,1);}
if(type==1) {
reveal('revealDiv1',step,timeOut,2);
reveal('revealDiv2',step,timeOut,3);}}
function reveal(who,step,timeOut,type) {
if(type==0)
var where="top";
if(type==1)
var where="bottom";
if(type==2)
var where="left";
if(type==3)
var where="right";
eval('var temp=document.getElementById(who).style.'+where);
temp=parseInt(temp);
if(type==0||type==1)
var checkWith=height/2;
if(type==2||type==3)
var checkWith=width/2;
if(-temp
eval('document.getElementById(who).style.'+where+' =temp;');
setTimeout("reveal('"+who+"',"+step+",'"+timeOut+" ',"+type+")", timeOut);}
else {
document.getElementById(who).style.display="none";
document.body.scroll="yes";}}
function initReveal(type,div1bg,div2bg,div1bw,div2bw,div1bc ,div2bc,step,timeOut,click) {
if(type==0) {
var bWhere1="border-bottom";
var bWhere2="border-top";
var putZero1="top:0px; left:0px";
var putZero2="bottom:0px; left:0px";
document.write('');
document.write('');
if(!click) {
reveal('revealDiv1',step,timeOut,0);
reveal('revealDiv2',step,timeOut,1);}
else {
clickText(type,step,timeOut);}}
if(type==1) {
var bWhere1="border-right";
var bWhere2="border-left";
var putZero1="top:0px; left:0px";
var putZero2="top:0px; right:0px";
document.write('');
document.write('');
if(!click) {
reveal('revealDiv1',step,timeOut,2);
reveal('revealDiv2',step,timeOut,3);}
else {
clickText(type,step,timeOut);}}
function clickText(type,step,timeOut) {
document.write(''+clickt+'
');}}
</script>
<script>
var clickw=170; // Width
var clickh=20; // Height
var clickb=2; // Border width
var clickc="#800000"; // Border color
var clickbg="#000000"; // Background color
var clickt="Hocam, Siteye Giriş İçin TIKLA."; // Text to display
var clickFont="font-family:Tahoma,arial,helvetica; font-size:10pt; font-weight:bold; color:#FF0000"; // The font style of the text
new initReveal(0,'#800000','#800000',1,1,'#00FF00','#0 00000',3,10,true);
</script> 
