取得input元素中部分选中(selected)的值_表单特效:From: http://www.7419.com/article.aspid=216 var agt=navigator.userAgent.toLowerCase(); var ie = ((agt.indexOf(msie) != -1) && (agt.indexOf(opera) == -1) && (agt.indexOf(omniweb) == -1)); function a(){ var myArea = document.getElemen