Tinybox popup + form submit

Hej,

Jeg vil lave et "login" som skal ske via popup med inputs.

Men når jeg submitér, så fader popup vinduet væk. Det skal den helst ikke.
Skal forblive i popup vinduet, og give en handling med logger ind eller ej.

Nogen der kan hjælpe?.

--
tinybox.js

 var TINY={};
 
 function T$(i){return document.getElementById(i)}
 
 TINY.box=function(){
     var p,m,b,fn,ic,iu,iw,ih,ia,f=0;
     return{
         show:function(c,u,w,h,a,t){
             if(!f){
                 p=document.createElement('div'); p.id='tinybox';
                 m=document.createElement('div'); m.id='tinymask';
                 b=document.createElement('div'); b.id='tinycontent';
                 document.body.appendChild(m); document.body.appendChild(p); p.appendChild(b);
                 m.onclick=TINY.box.hide; window.onresize=TINY.box.resize; f=1
             }
             if(!a&&!u){
                 p.style.width=w?w+'px':'auto'; p.style.height=h?h+'px':'auto';
                 p.style.backgroundImage='none'; b.innerHTML=c
             }else{
                 b.style.display='none'; p.style.width=p.style.height='100px'
             }
             this.mask();
             ic=c; iu=u; iw=w; ih=h; ia=a; this.alpha(m,1,80,3);
             if(t){setTimeout(function(){TINY.box.hide()},1000*t)}
         },
         fill:function(c,u,w,h,a){
             if(u){
                 p.style.backgroundImage='';
                 var x=window.XMLHttpRequest?new XMLHttpRequest():new ActiveXObject('Microsoft.XMLHTTP');
                 x.onreadystatechange=function(){
                     if(x.readyState==4&&x.status==200){TINY.box.psh(x.responseText,w,h,a)}
                 };
                 x.open('GET',c,1); x.send(null)
             }else{
                 this.psh(c,w,h,a)
             }
         },
         psh:function(c,w,h,a){
             if(a){
                 if(!w||!h){
                     var x=p.style.width, y=p.style.height; b.innerHTML=c;
                     p.style.width=w?w+'px':''; p.style.height=h?h+'px':'';
                     b.style.display='';
                     w=parseInt(b.offsetWidth); h=parseInt(b.offsetHeight);
                     b.style.display='none'; p.style.width=x; p.style.height=y;
                 }else{
                     b.innerHTML=c
                 }
                 this.size(p,w,h)
             }else{
                 p.style.backgroundImage='none'
             }
         },
         hide:function(){
             TINY.box.alpha(p,-1,0,3)
         },
         resize:function(){
             TINY.box.pos(); TINY.box.mask()
         },
         mask:function(){
             m.style.height=TINY.page.total(1)+'px';
             m.style.width=''; m.style.width=TINY.page.total(0)+'px'
         },
         pos:function(){
             var t=(TINY.page.height()/2)-(p.offsetHeight/2); t=t<10?10:t;
             p.style.top=(t+TINY.page.top())+'px';
             p.style.left=(TINY.page.width()/2)-(p.offsetWidth/2)+'px'
         },
         alpha:function(e,d,a){
             clearInterval(e.ai);
             if(d==1){
                 e.style.opacity=0; e.style.filter='alpha(opacity=0)';
                 e.style.display='block'; this.pos()
             }
             e.ai=setInterval(function(){TINY.box.ta(e,a,d)},20)
         },
         ta:function(e,a,d){
             var o=Math.round(e.style.opacity*100);
             if(o==a){
                 clearInterval(e.ai);
                 if(d==-1){
                     e.style.display='none';
                     e==p?TINY.box.alpha(m,-1,0,2):b.innerHTML=p.style.backgroundImage=''
                 }else{
                     e==m?this.alpha(p,1,100):TINY.box.fill(ic,iu,iw,ih,ia)
                 }
             }else{
                 var n=Math.ceil((o+((a-o)*.5))); n=n==1?0:n;
                 e.style.opacity=n/100; e.style.filter='alpha(opacity='+n+')'
             }
         },
         size:function(e,w,h){
             e=typeof e=='object'?e:T$(e); clearInterval(e.si);
             var ow=e.offsetWidth, oh=e.offsetHeight,
             wo=ow-parseInt(e.style.width), ho=oh-parseInt(e.style.height);
             var wd=ow-wo>w?0:1, hd=(oh-ho>h)?0:1;
             e.si=setInterval(function(){TINY.box.ts(e,w,wo,wd,h,ho,hd)},20)
         },
         ts:function(e,w,wo,wd,h,ho,hd){
             var ow=e.offsetWidth-wo, oh=e.offsetHeight-ho;
             if(ow==w&&oh==h){
                 clearInterval(e.si); p.style.backgroundImage='none'; b.style.display='block'
             }else{
                 if(ow!=w){var n=ow+((w-ow)*.5); e.style.width=wd?Math.ceil(n)+'px':Math.floor(n)+'px'}
                 if(oh!=h){var n=oh+((h-oh)*.5); e.style.height=hd?Math.ceil(n)+'px':Math.floor(n)+'px'}
                 this.pos()
             }
         }
     }
 }();
 
 TINY.page=function(){
     return{
         top:function(){return document.documentElement.scrollTop||document.body.scrollTop},
         width:function(){return self.innerWidth||document.documentElement.clientWidth||document.body.clientWidth},
         height:function(){return self.innerHeight||document.documentElement.clientHeight||document.body.clientHeight},
         total:function(d){
             var b=document.body, e=document.documentElement;
             return d?Math.max(Math.max(b.scrollHeight,e.scrollHeight),Math.max(b.clientHeight,e.clientHeight)):
             Math.max(Math.max(b.scrollWidth,e.scrollWidth),Math.max(b.clientWidth,e.clientWidth))
         }
     }
 }();

Styk jasvascript kode i index.php

 <script type="text/javascript">
     T$('adm').onclick = function(){TINY.box.show('minsti.php',1,300,150,1)}
 </script>

Funktionen til at kalde på popup vinduet i index.php

 <div class="button" id="adm">Admin</div>

minsti.php (bare eksempel på stinavn.

 <?php
 if(isset($_POST['login'])):
 echo ("Handler ind nu.<br />");
 else: 
 echo ("Skal vi handle eller hvad?<br />");
 endif;
 ?>
 <form action="" method="POST">
 <b>Brugernavn:</b>
 <input>
 <br />
 <b>Kodeord:</b>
 <input>
 <br />
 <input type="submit" name="login" value="Login">
 </form>

Ved klikket, forsvinder vinduet.

Håber i kan hjælpe mig videre.