var scrollbarWidth = 0 //px
    var maxWindowHeight = 700 //px
    var PreviewImageObject = document.getElementById('previewImage')
    var PreviewImageObjectID = 'previewImage'

    function GetImageInfo()
    {
        
        if(PreviewImageObject)
        {
            setTimeout('presetWindow()',50)
        }
        else
        {
            PreviewImageObject = document.getElementById(PreviewImageObjectID);
            setTimeout('GetImageInfo()',200)
        }
    }
    
    function presetWindow()
    {
            ImageWidth = PreviewImageObject.width
            ImageHeight = PreviewImageObject.height
            setWindowSize(ImageWidth , ImageHeight)
            setContentSize(ImageWidth , ImageHeight)
    }
    
    function setWindowSize(ImageWidth, ImageHeight)
    {
        if(ImageHeight < maxWindowHeight)
            window.resizeTo((ImageWidth+ scrollbarWidth),ImageHeight+38)
        else    
            window.resizeTo((ImageWidth+ scrollbarWidth),maxWindowHeight+38)
    }
    
    function setContentSize(ImageWidth,ImageHeight)
    {
        document.getElementById('previewContainer').style.width=(ImageWidth+17)
        if(ImageHeight < maxWindowHeight)
        {
            document.getElementById('previewContainer').style.height = ImageHeight+38
        }
        else
        {    
            document.getElementById('previewContainer').style.height = maxWindowHeight;
        }
        document.getElementById('previewContainer').style.overflow='auto'
        document.getElementById('previewContainer').style.scrollbars = 'yes'
       
    }
    
    GetImageInfo();
    //document.getElementsByTagName('body')[0].focus();