document.write('<img src="http://www.emilio.01wed.com/checknum.php?show=img" style="cursor:hand" align="absmiddle" onclick="javascript:document.all.ck_num_img_2431.src+=\'&\'+Math.random();return false;" id="ck_num_img_2431">&nbsp;<a href="#" onclick="javascript:document.all.ck_num_img_2431.src+=\'&\'+Math.random();return false;" title="点击图片更换验证码！">换验证码</a>');