JSP高手请进

<TD  class= title>
          性别
        </TD>
        <TD  class= input>
         <Input name=Sex class="codeno" verify="性别|notnull&code:Sex" ondblclick="return showCodeList('Sex',[this,SexName],[0,1]);"
onkeyup="return showCodeListKey('Sex',[this,SexName],[0,1]);" ><input class=codename name=SexName readonly elementtype=nacessary>
        </TD>
请高手帮忙解释，最好详细点