/*
 * @author jie cai jianjian@ihug.com.au
 */
 
function preload(list)
{	if (! document.preload_imgs)
	{	document.preload_imgs = new Array(list.length);
		start_idx = 0;		//start_idx
		window.status = "No document.preload_imgs has yet created !";
	}else
	{	start_idx = document.preload_imgs.length;
		tmp = new Array (start_idx+list.length);
		for (i=0; i<start_idx; i++)
			tmp[i] = document.preload_imgs[i];
		document.preload_imgs = tmp;
	}
		
	for (i=0; i<list.length; i++)
	{	document.preload_imgs[start_idx+i] = new Image();
		document.preload_imgs[start_idx+i].src = list[i]
	}	
	return start_idx;
}