var $j = jQuery.noConflict();
$j(document).ready(function() {
    var dh = $j(document).height();
    var total_width = 600;
    $j(".sidebar_image").each(function(){
        total_width = total_width + parseInt($j(this).attr('height'));
        if (total_width < dh) {
            console.log("OK");
            $j(this).show();
        }
    })
    //alert("DH: " + dh + "px");
})