function setColumnHeight(leftcolumnId, rightColumnId, leftshadowId, rightshadowId)
{
    var leftshadow = document.getElementById(leftshadowId);
    var rightshadow = document.getElementById(rightshadowId);
    var left = document.getElementById(leftcolumnId);
    var right = document.getElementById(rightColumnId);

    leftshadow.style.height = left.offsetHeight + 'px';
    rightshadow.style.height = left.offsetHeight + 'px';
    if(left.offsetHeight > right.offsetHeight) {
        right.style.height = left.offsetHeight + 'px';
        
    } else {
        left.style.height = right.offsetHeight + 'px';
    }
}
function setColums() {
    setColumnHeight("leftcolumnContent", "rightcolumnContent", "leftcolumnContent_shadow", "rightcolumnContent_shadow");
}
addLoadEvent(setColums);