<SCRIPT LANGUAGE="JavaScript">
<!--
strContent = "<table><tr class=fff name=class><td>my class</td></tr></table>"
alert(strContent);
var r = /(>[^<>]*)\bclass(\b[^<>]*<)/gi;
strContent = strContent.replace(r,"$1<font color=red class=bgc>class</font>$2");
alert(strContent);
//-->
</SCRIPT>
<!--
strContent = "<table><tr class=fff name=class><td>my class</td></tr></table>"
alert(strContent);
var r = /(>[^<>]*)\bclass(\b[^<>]*<)/gi;
strContent = strContent.replace(r,"$1<font color=red class=bgc>class</font>$2");
alert(strContent);
//-->
</SCRIPT>
比如将 my class is clsdb.i am asp
替换class,as,am,其他的不变。