/* ----javascript------ */
var thenow_i=0;
//�ı���ض���ı���ͼ
function chgobj_thebg(bg_var)
{
	if(bg_var>0){ thenow_i=bg_var-1; }
	if(document.getelementbyid(bg_obj))
	{
		var bgobj=document.getelementbyid(bg_obj);
		var bgurl=theimgs[thenow_i];
		if(bg_type==0)
		{
			//bgobj.style.background="url(" + bgurl + ")";
			bgobj.style.background="url(" + bgurl + ") no-repeat";
		}
		else
		{
			bgobj.style.background=bgurl;
		}
	}
}

//����ʱ���õ��զ�����
function auto_chgbg()
{
	var thernd_num;
	if(thenow_i==theimgs.length)
	{
		thenow_i=0;
	}
	chgobj_thebg();
	//���������
	thernd_num=math.floor(math.random()*theimgs.length);
	thenow_i=thernd_num;
	//thenow_i+=1;
	settimeout("auto_chgbg();",rotation_time);
}