求正则表达式，谢谢

Question

var a="<tr height=42 style='mso-height-source:userset;height:31.5pt'><td height=42 class=xl29 style='height:31.5pt;border-top:none'>王莉</td><td class=xl30 style='border-top:none;border-left:none' x:num>21260118</td></tr>";
var b=/<td ([^>]*?)>/g
var c=/<tr ([^>]*?)>/g
alert(a.replace(b,"<td>").replace(c,"<tr>"))

Answer 1

var a="<tr height=42 style='mso-height-source:userset;height:31.5pt'><td height=42 class=xl29 style='height:31.5pt;border-top:none'>王莉</td><td class=xl30 style='border-top:none;border-left:none' x:num>21260118</td></tr>";
var b=/<(t\w) [^>]*?>/g
//var c=/<tr ([^>]*?)>/g
alert(a.replace(b,"<$1>"))