var iFrameID = 'BM_Frame_' + new Date().valueOf();
var output = '';


output += '<style>';
output += 'html,body {padding:0; margin:0; height:100%;}';
output += '.BM_AppContainer iframe {';
output += 'width:100%; height:100%;';
output += 'position:relative;';
 output += 'height:600px;';
 output+= ' border:0;}';
 output+= '</style>';
var frame = '<div class="BM_AppContainer"><iframe id="' + iFrameID + '" src="https://app.paynplan.nl/agenda-embedded.html?embedded=1&external=1&page=agenda&idc=2784"></iframe></div>';

document.write(output);
document.write(frame);