.layer_main {
 display:none;
 visibility:hidden;
}
.mainframeleft
{
background: url(http://www.eigene-homepage.de/hptemplates/images/blueportal_midleft.gif) repeat-y ;
height:100%;
}
.mainframeright
{
background: url(http://www.eigene-homepage.de/hptemplates/images/blueportal_midright.gif) repeat-y ;
height:100%;
}