socialforge/app/views/projects/invite_members_by_mail.html.erb

<script>
    function verifyAddress() {
        var email = $('#mail').val();
        var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
        if (email == "" || filter.test(email)) {
            $("#valid_email").html("");
        }
        else
        {
            $("#valid_email").html("您所填写的电子邮件格式不正确");
        }
    }


//        if (filter.test(email)&& !(email.value == null)) return true;
//            else
//            {
//                document.getElementById('valid_email').innerHTML = "您所填写的电子邮件格式不正确";
//                document.getElementById('valid_email').style.color = "#FF0000";
//                return false;
//            }
//
//        }
</script>
<div class="project_r_h">
  <h2 class="project_h2">邀请加入</h2>
</div>
<div  class="floatbox" style="margin:130px;">
	<div >
		<a href="#" class="box_close"></a>
	</div>
	<div class="cl"></div>
	<div class="box_main">
		<h3 class="box_h3">发送邮件邀请新用户</h3>
		<p class="box_p">
			输入好友邮箱地址，Trustie会自动为该邮箱注册用户！
		</p>
		<div id="is_registed">
			<%= render :partial => 'regested', locals: { :isregisted => false} %>
		</div>
			<%= form_tag('send_mail_to_member', :controller => 'projects',:action => 'send_mail_to_member', method: 'get') do %>
				<span id="valid_email" style="color: #FF0000;"></span>
                <%= text_field_tag 'mail',  '', :class => "fb_item fl", :placeholder => l(:label_input_email), :onblur => "verifyAddress();" %>
                <div class="cl"></div>
                <div class="cl"></div>
                <a href="#" class="btn_free" onclick="$(this).parent().submit();">
                    <%= l(:label_send_email)%>
                </a>
				<%#= submit_tag '免费发送', :style => "display:block; width:80px; text-align:center; color:#fff; height:26px; padding-top:3px; margin-bottom:10px;" %>
			<% end %>
	</div>
</div>