document.writeln("<script type=\'text/javascript\' src=\'//abc.xxx.com/common/dy/source/x/common/nqv_vu/static/e.js\'></script>");

document.write("<script type=\"text\/javascript\" src=\"\/\/abc.xxxx.com\/production\/m\/static\/hgdgni\/common\/p_w.js\"><\/script>");
为什么写两个？一个针对PC 一个针对手机吗？  document.writeln  和 document.write好像没多大区别呀!!