function resizeBody(){

    var heightViewPort = YAHOO.util.Dom.getViewportHeight();
    var heightHeader = YAHOO.util.Dom.get("hd").offsetHeight;
    var heightBody = YAHOO.util.Dom.get("bd").offsetHeight;
    var heightFooter = YAHOO.util.Dom.get("ft").offsetHeight;
    var heightTotal = heightHeader + heightBody + heightFooter;

    if(heightTotal < heightViewPort){
        heightBody = heightViewPort - heightHeader - heightFooter;
        YAHOO.util.Dom.setStyle("bd", "height", heightBody + "px");
    }

    YAHOO.util.Dom.setStyle("dLeft", "height", heightBody + "px");
    YAHOO.util.Dom.setStyle("dMain", "height", heightBody + "px");
    YAHOO.util.Dom.setStyle("dRight", "height", heightBody + "px");

}

YAHOO.util.Event.addListener(window.self, "resize", resizeBody);