function SetRadImageSize(tagName, maxWidth)
{
    var startTag = document.getElementById(tagName);
    var objs = document.getElementsByTagName("IMG");
            
    // loop through the images  
    for(i=0; i<objs.length; i++)
    {
        if (objs[i].width > maxWidth)
        {
            objs[i].width = maxWidth;
        }  
    }
}