Footer not auto moving down the page - html

Question

i am using this CSS for my footer:
/* FOOTER */
#footer {
width:100%;
height:580px;
border-top:4px solid #666666;
background-color:#eeeeee;
}
#footer-inner {
width:80%;
margin:0 auto 0 auto;
height:inherit;
}
#footerTop {
width:100%;
height:480px;
padding-top:10px;
border-bottom:2px #000000 solid;
}
#footerTopLeft {
width:30%;
height:420px;
float:left;
display:inline;
margin-top:10px;
padding:0 15px 10px 15px;
border-right:1px solid #000000;
}
#footerTopMid {
width:30%;
height:420px;
float:left;
display:inline;
margin-top:10px;
padding:0 15px 10px 15px;
border-right:1px solid #000000;
}
#footerTopRight {
width:30%;
height:420px;
float:left;
display:inline;
padding:0 15px 10px 15px;
}
#enquiryForm { clear:both; padding:8px 40px 0 0; }
.enquiryField { clear:both; padding:5px 0; }
.enquiryField label { clear:none; float:left; }
.enquiryField input { clear:none; font-family:Calibri; float:right; padding:3px; width:189px; }
.enquiryField textarea { clear:none; float:right; font-family:Calibri; padding:5px; width:189px; }
.enquiryError { clear:both; color:#fff; font-family:Calibri; }
#enquirySent { color:#fff; font-family:Calibri; }
but it is not moving down the page automatically depending on how much content is above it. here is a fiddle with the full css/HTML:
http://jsfiddle.net/ctmGT/
i seem to have to change the div height that i have depending on the amount of content i have

Answer 1

you need to change
<div style="clear: both; height:500px;"></div>
to
<div class="push"></div>