// select only the first element for each name, and only those with rules specified　　//if ( this.name in rulesCache || !validator.objectLength($(this).rules()) ) { return false; }

<form>　　<input type='text' name='name' id='name1' val=''/>　　<input type='text' name='name' id='name2' val=''/></form>

　var $form=$('form'),validator=$form.validate();　　$.extend(validator.settings,{　　　　rules:{　　　　　　"name":'required'　　　　}　　});