window.onLoad = setInterval(refreshImage, 5*1000);


function refreshImage()
{
img1 = document.getElementById("cam1");
img1.src=image_cam1 + "?" + Math.random();

img2 = document.getElementById("cam2");
img2.src=image_cam2 + "?" + Math.random();

img3 = document.getElementById("cam3");
img3.src=image_cam3 + "?" + Math.random();

img4 = document.getElementById("cam4");
img4.src=image_cam4 + "?" + Math.random();

img5 = document.getElementById("cam5");
img5.src=image_cam5 + "?" + Math.random();

img6 = document.getElementById("cam6");
img6.src=image_cam6 + "?" + Math.random();
}