function getHeight()
{
    var frame = document.getElementById("container");  
    var htmlheight = document.body.parentNode.scrollHeight;  
    var windowheight = window.innerHeight;
    if (windowheight == null)
    {
        windowheight = document.documentElement.clientHeight;
    } 
    if ( htmlheight < windowheight ) { document.body.style.height = windowheight + "px"; frame.style.height = windowheight + "px"; }  
    else { document.body.style.height = htmlheight + "px"; frame.style.height = htmlheight + "px"; }
}