自动刷新多个图像

Question

我将js用于多个图像，但是不再起作用。

function refresh(){
document.images["r1"].src="https://www.meteo-hellas.com/cam/neairakleia/"+"?"+new Date();
document.images["r2"].src="http://www.sithoniaweather.gr/cam/sithonia.jpg"+"?"+new Date();
document.images["r3"].src="https://www.camping-melissi.gr/images/melissicam/snap/webcam.jpg"+"?"+new Date();
document.images["r4"].src="https://images.webcamgalore.com/22546-current-webcam-Nea-Roda.jpg"+"?"+new Date();
document.images["r5"].src="http://penteli.meteo.gr/stations/megistilavra/cam/megisti.jpg"+"?"+new Date();
document.images["r6"].src="https://www.meteo-hellas.com/cam/galatista"+"?"+new Date();
document.images["r7"].src="https://www.meteo-hellas.com/cam/arnaia"+"?"+new Date();
document.images["r8"].src="http://northmeteo.gr/cam/agios-nikolaos/FI9901EP_00626E6A0440/index.php"+"?"+new Date();
document.images["r9"].src="http://northmeteo.gr/cam/parthenonas/FI9900P_00626E869B39"+"?"+new Date();
document.images["r10"].src="http://ormos-panagias.sithoniaweather.gr/cam/cam1.jpg"+"?"+new Date();
document.images["r11"].src="http://www.meteo-hellas.com/cam/cholomontas"+"?"+new Date();
setTimeout('refresh()', 15000);}

if(document.images)window.onload=refresh;