Background image repeat issue - css

Question

I have 3 divs inside my div#all (simple html). Left - Main - Right.
Left & Right have just a background image (their content won't change).
Main div will have all my text etc.
Option 1: I need to have the left/right divs to expand their height (so my image background gets repeated) to reach the height that my divMain may have.
Option 2: I can do position:fixed my Left/Right divs as well so they stay in place when I scroll. My issue on this plan is that I cannot position/float my right div at the desired place.
Any working option is ok with me.
css code:
body{
margin: 0 auto;
padding: 0;
width: 100%;
background-color: #fff;
overflow-y: auto; overflow-x: auto;
}
#all{
position: absolute;
top: 0; left: 50%;
height: 100%; width: 1366px;
margin-left: -683px;
}
#temp-left{
position: absolute;
top: 0; left: 0;
height: 100%; width: 183px;
background: url(image/bg-lft.jpg) repeat;
}
#temp-right{
position: absolute;
top: 0; right: 0;
height: 100%; width: 183px;
background: url(image/bg-rgt.jpg) repeat;
}
#main{
position: absolute;
top: 0px; left: 50%;
height: 100%; width: 960px;
padding: 10px;
margin-left: -500px;
text-align: justify;
}

Answer 1

If I properly understand your question i suggest you to use jquery
You can try this out.
$(document).ready(function() {
// Check if body height or width is higher than window height and width:)
if (($("body").height() > $(window).height())||($("body").width() > $(window).width())) {
$('body').css('background-image', 'url(image/bg-lft.jpg) repeat;');
}
else
$('body').css('background-image', 'url(image/bg-lft.jpg) no-repeat;');
});