resizeIframe = function(iframeName){
                                                var iframe = document.getElementById(iframeName);
                                                if (iframe.contentDocument) {
                                                                // FF
                                                                iframe.style.height = iframe.contentDocument.height + 24 + "px";
                                                }
                                                if (iframe.contentWindow.document.body) {
                                                                // IE7
                                                                iframe.style.height =  500 + "px";
                                                }
                                };
                                
                                resizeAllIframes = function() {
                                                var iframeList = document.getElementsByTagName('iframe');
                                                if(!iframeList ) return;
                                                
                                                for(var i = 0; i < iframeList.length; i++ )   {
                                                                var iframe = iframeList.item(i);
                                                                resizeIframe(iframe.id);
                                                }
                                }
                                onload = resizeAllIframes;