^
$
(\d{1,3}.){3}\d{1,3}
[a-zA-z]+://[^\s]* ^((http://)|(https://))?(a-zA-Z0-9?.)+[a-zA-Z]{2,6}(/)
(a-zA-Z0-9?.)+[a-zA-Z]{2,6}(/) [a-zA-Z0-9][-a-zA-Z0-9]{0,62}(.[a-zA-Z0-9][-a-zA-Z0-9]{0,62})+.?/
^.admin:.$
^[ \t]*\n
[\u4e00-\u9fa5]
[^\x00-\xff]
var h3 = document.getElementsByTagName('h3');
for(var i=0;i<h3.length;i++){
var a = h3[i]. getElementsByTagName('a');
console.log(a[0].href);
}