[RESOLVED] Why when my website load the slidwhow display on the left bottom and not center ?

I have css style file.
The problem is that my chrome for example chrome is on 100% zoom.
But my brother chrome he is using it with 150% zoom.

And my slideshow position is on left bottom.

What i need it to be and to do is:

This is screenshot of how the page look like at 100% zoom:

[URL=”http://postimg.org/image/7rr13ahmr/”]http://postimg.org/image/7rr13ahmr/[/URL]

And this is the css style file code:

[CODE]/* null margins and padding to give good cross-browser baseline */
html,body,address,blockquote,div,
form,fieldset,caption,
h1,h2,h3,h4,h5,h6,
hr,ul,li,ol,ul,dd,dt,dl,
table,tr,td,th,p,img {
margin:0;
padding:0;
}

img,fieldset {
border:none;
}

hr {
display:none;
/*
HR in my code are for semantic breaks in topic/section, NOT
style/presenation, so hide them from screen.css users
*/
}

@media (max-width:600px) {
* {
-webkit-text-size-adjust:none;
-moz-text-size-adjust:none;
-ms-text-size-adjust:none;
}
}

body {
font:normal 85%/150% “segoe ui”,helvetica,sans-serif;
background-image: url(“CB1.html”);
position:fixed; //(relative, absolute, static*)
top: 120px;
left: 120px;
bottom: 120px;
}

.ss_scripted img {
display:none;
}

.ss_scripted .ss_show {
display: block;
}

#slideShow img {
margin:0 auto;
}

#slideCounter {
text-align:center;
padding:0.25em 1em;
font:bold 200%/120% consolas,courier,monospace;
color:#C00;
}

#slideControls {
width:512px;
padding:0.5em 0;
margin:0 auto;
}

#slideControls a {
float:left;
padding:0.25em 0.6em;
text-decoration:none;
color:#000;
background:#EEE;
border:2px solid #666;
-webkit-border-radius:1em;
-moz-border-radius:1em;
border-radius:1em;
-webkit-box-shadow:
inset 0 -0.5em 1em rgba(0,0,0,0.3),
0 0 1px #000;
-moz-box-shadow:
inset 0 -0.5em 1em rgba(0,0,0,0.3),
0 0 1px #000;
box-shadow:
inset 0 -0.5em 1em rgba(0,0,0,0.3),
0 0 1px #000;
}

#slideControls a:active,
#slideControls a:focus,
#slideControls a:hover {
background:#FFF;
}

#slideControls .next {
float:right;
} [/CODE]

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