function setHeight() {
    len= document.getElementById("dContent").offsetHeight;
    if(len > 40) {
        document.getElementById("dWindow").style.height = len + 250 + "px"; 
        if (cv= document.getElementById("dContentVisual")) {
            cv.style.height = len + "px"; 
        } else {
            document.getElementById("dContent").style.height = (len-5) + "px"; 
        }
    }
}