var min_height = 658; 

window.onload = function() {
    justDoIt(); 
}
               
window.onresize = function() {   
    justDoIt();
}

function justDoIt() {
    var correctie =  (document.viewport.getHeight()-$('menu').offsetHeight-$('header').offsetHeight)-$('real_content').offsetHeight;
    
    if(correctie < 0 ) correctie = 0;
    $('wrapper').style.height   = $('real_content').offsetHeight+correctie+$('header').offsetHeight+$('menu').offsetHeight;
    $('inner').style.height     = $('real_content').offsetHeight+correctie;
    var height                  = $('real_content').offsetHeight+correctie; 
      

    $('left').style.height          = height+'px';
    $('center').style.height        = height+'px';
    $('right').style.height         = height+'px';
    $('leftPanel').style.height     = height+'px';
    $('centerPanel').style.height   = height+'px';
    $('rightPanel').style.height    = height+'px';
       
}