will someone modify this css code, only 2 adjustments required

Hi,
i am using a popup in which i want a few adjustments as due to my weak knowledge i will not be able to do, so i would be happy if someone gives me 10 minutes of his life, as i don't think it will take more then that for an expert to do so
i have one problem that this popup moves with screen is not fixed

like the other popup on my same page which is a big play button that popup scrolls as you scroll so doesn't let you look at blog and it has a close button above game which is

taking space, i thought if there is any way of getting rid of these

two things,
1st is to make the game scroll with the scroll
2nd to bring down the close button under the game.
well here is the link to the page where you can see it
http://www.bloghuts.com/2010/09/laces-girl-dress-up.html
here is the css

#backgroundPopup{
display:none;
position:fixed;
_position:absolute; /* hack for internet explorer 6*/
height:100%;
width:100%;
top:0;
left:0;
background:#000000;
border:1px solid #cecece;
z-index:1;
}
#popupContact{
display:none;
position:fixed;
top:0;
left:0;
_position:absolute; /* hack for internet explorer 6*/
height:100%;
width:100%;
background:#FFFFFF;
border:2px solid #cecece;
z-index:2;
}

#popupContactClose{
top:10px;
left:10px;
float: right;
    margin: 8px 15px 0px 0px;
}
#button{
text-align:center;
margin:5px;
}

Code (markup):

this is the html i am using for it

<div id="button">
<input type="submit" value="Play" /></div>
<div id="popupContact">
<a id="popupContactClose">x</a>
Here goes the game embed
</div>
<div id="backgroundPopup">
</div>

Code (markup):

and this is the javascript for it

<script type='text/javascript'>
//<![CDATA[

/***************************/
popupforgames 
/***************************/

//SETTING UP OUR POPUP
//0 means disabled; 1 means enabled;
var popupStatus = 0;

//loading popup with jQuery magic!
function loadPopup(){
//loads popup only if it is disabled
if(popupStatus==0){
$("#backgroundPopup").css({
 "opacity": "0.7"
});
$("#backgroundPopup").fadeIn("slow");
$("#popupContact").fadeIn("slow");
popupStatus = 1;
}
}

//disabling popup with jQuery magic!
function disablePopup(){
//disables popup only if it is enabled
if(popupStatus==1){
$("#backgroundPopup").fadeOut("slow");
$("#popupContact").fadeOut("slow");
popupStatus = 0;
}
}

//centering popup
function centerPopup(){
//request data for centering
var windowWidth = document.documentElement.clientWidth;
var windowHeight = document.documentElement.clientHeight;
var popupHeight = $("#popupContact").height();
var popupWidth = $("#popupContact").width();
//centering
$("#popupContact").css({
"position": "absolute",
"top": windowHeight/2-popupHeight/2,
"left": windowWidth/2-popupWidth/2
});
//only need force for IE6

$("#backgroundPopup").css({
"height": windowHeight
});

}


//CONTROLLING EVENTS IN jQuery
$(document).ready(function(){

//LOADING POPUP
//Click the button event!
$("#button").click(function(){
//centering with css
centerPopup();
//load popup
loadPopup();
});

//CLOSING POPUP
//Click the x event!
$("#popupContactClose").click(function(){
disablePopup();
});
//Click out event!
$("#backgroundPopup").click(function(){
disablePopup();
});
//Press Escape event!
$(document).keypress(function(e){
if(e.keyCode==27 && popupStatus==1){
 disablePopup();
}
});

});

//]]>
</script>

Code (markup):

thank you in advance

 

Well no need to help i solved the problem on my own, thank you everyone for reading and giving me time.
take care.