LeftMenuId = "left-menu";
ContentId = "content-holder";


function ContentSizeAdjust() {
if ((document.getElementById(LeftMenuId) != null) &&
    (document.getElementById(ContentId) != null)) {

document.getElementById(ContentId).style.height = "auto";

if (document.getElementById(LeftMenuId).clientHeight > document.getElementById(ContentId).clientHeight) {  
    document.getElementById(ContentId).style.height = document.getElementById(LeftMenuId).clientHeight + "px";
}
}
return 0;
}