CSS problem . help needed Urgently.

[Supercops]

I am using css in my site and my site is aligned towards left and i want it in centre. please see www.cash81.com and i am also attaching the css code so that we can get the solution for this problem. I also want to make this some what colorfull like the light blue one in the background
Also please review / suggest a few changes in the css code and in the site

thanks

CSS code.

/* Online Business, free web template*/

body {
margin: 0;
padding: 0;
font-size: 100%;
text-align: left;
background: #e0e0e0;
color: #333;


}


/* Global styles */
* {margin: 0; padding: 0; border: 0;}
span {color: #00A2FF}
p, ul, p a, h2 {font-family: Arial, Helvetica, sans-serif}


/* Heading styles */
h1 {margin-left: 5px; font-family: Georgia, serif; color: #333; float: left; font-weight: normal; margin-left: 5px; font-size: 1.25em}
h1 a:link, h1 a:visited, h1 a:active {text-decoration: none; color: #333; font-weight: normal}
h1 a:link span, h1 a:visited span, h1 a:active span {text-decoration: none; font-weight: normal}
h1 a:hover {color: #00A2FF; text-decoration: none; font-weight: normal}
h1 a:hover span {color: #333; text-decoration: none; font-weight: normal}

h3 a, h3 a:link, h3 a:hover {font-weight: normal} /* styling for h3 heading links */
h4 a, h4 a:link, h4 a:hover, h5 a:link, h5 a:hover {font-weight: bold} /* styling for other heading links */

h2 {margin: 0; padding-left: 10px; font-size: 0.75em; background-color: #333; color: #fff; line-height: 2.0em} /* headings on black backgrounds */

h3, h4, h5 {font-family: Georgia, serif; margin: 20px 0 0 10px}
h3 {font-size: 1.25em; line-height: 1.25em; font-weight: normal}
h4 {font-size: 0.90em; line-height: 0.90em; font-weight: bold}
h5 {font-size: 0.70em; line-height: 0.70em; font-family: Arial, Helvetica, sans-serif; font-weight: bold} /* appears like bold paragraph text */



/* Text styles */
p {margin: 10px; font-size: 0.70em; line-height: 1.75em}

p.updated {margin-left: 10px; font-size: 0.60em; line-height: 0.60em; letter-spacing: 0.05em; color: #888}

#siteimg p { /* This is the large text in the site img div */
margin: 0 0 0 10px; /* removed usual top and bottom margin from paragraph to avoid layout breaking */
padding-left: 1px;
padding-top: 40px;
font-family: Georgia, serif;
font-size: 1.25em;
line-height: 1.50em;
font-weight: normal;
letter-spacing: -0.05em;
}

acronym {border-bottom: 1px dashed #333; cursor: help}

ul {margin-left: 10px; font-size: 0.70em; line-height: 1.75em; list-style: inside square}



/* Paragraph Links */
a {color: #00A2FF; font-weight: bold; text-decoration: none} /* The blue colour */
a:link {color: #00A2FF; font-weight: bold; text-decoration: none}
a:hover {color: #333; font-weight: bold; text-decoration: none}


/* Divs */

#container {
width: 770px; /* Suits an 800x600 page, allowing for scrollbar */
background: #fff;
overflow: hidden
}

#topbar { /* Top bar, can be used for extra links etc */
width: 770px;
height: 25px;
background: #333
}


#hdr { /* Header/Banner area */
width: 770px; /* Suits an 800x600 page, allowing for scrollbar */
height: 2.5em; /* Same as h1 line-height */
line-height: 2.5em;
background: #fff
}

#navbar { /* Main Navigation area */
width: 770px; /* Suits an 800x600 page, allowing for scrollbar */
height: 1.75em;
background: #f0f0f0; /* Light Grey */
}

#siteimg { /* Large Site Image */
width: 770px; /* Suits an 800x600 page, allowing for scrollbar */
height: 200px;
background: url('images/siteimage.jpg') #fff; /* Light Grey */
}



#lftcol {
float: left;
width: 600px;
background: transparent;
overflow: hidden
}


#rgtcol {
float: left;
width: 170px;
background: transparent;
overflow: hidden
}


#bttmbar { /* bottom bar, containing top button and copyright info etc */
float: right;
width: 770px;
height: 3em;
line-height: 3em;
background: #fff;
overflow: hidden
}


/* Main Navigation */
#nav ul {display: inline}

#nav li {display: inline}

#nav a {
line-height: 30px; /* same as height of nav bar */
margin-left: 10px;
display: inline;
font-weight: bold
}

#nav a span {color: #333}




/* Images */
img.rightimg {float: right; margin-left: 10px}
img.leftimg {float: left; margin-right: 10px}

img.languageimg {float: right; margin: 4px 2px 0 0} /* used for the language flags */

[Tomassi]

put the whole site in a div and do margin:0 auto;
and in your body style do text-align:center;