<script language="javascript" type="text/javascript">
var str1 = '<a href=\"tttt\" id=ahref><span id=\ "sp\" >test</strong></a>';
var str2 = str1.replace(/(id\s*=[\s\'\"]*)([^\s\'\">]+)/g,"$1myStr_$2");
alert(str1+"\n"+str2);
</script>
效果自己测试吧
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