Chris May

       function IFrameHeight(){  
                     if(document.getElementById && !(document.all)) 
                     { 
                           h = document.getElementById('iframename').contentDocument.body.scrollHeight; 
                           document.getElementById('iframename').style.height = h; 
                           w = document.getElementById('iframename').contentDocument.body.scrollWidth; 
                           document.getElementById('iframename').style.width = w; 
                     } 
                     else if(document.all) 
                     { 
                           h = document.frames('iframename').document.body.scrollHeight; 
                           document.all.iframename.style.height = h; 
                            w = document.getElementById('iframename').document.body.scrollWidth; 
                          document.all.iframename.style.width = w; 
                     } 
       }