// JavaScript Document
var num_img=1; 
	function cambiar() 
	{      
		imagen=new Image
		imagen.src="imgram/" + num_img + ".jpg" 
		document.images['img'].src=imagen.src 
		num_img=num_img+1; 
				if (num_img>1)/*4*/
		{
			num_img=1
		}
	}
setInterval("cambiar()",7000);