js判断textbox不为空
需求：我有10个TextBox，想通过js一次性判断这10个TextBox（10个textbox在一个div里）是否为空，如果全为空，alert错误信息；只要有一个不为空就继续别得操作。
这个怎么用JS实现？在线等
[解决办法]
- HTML code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm6.aspx.cs" Inherits="CheckBox.WebForm6" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title></head><body> <form id="form1" runat="server"> <div id="text"> <asp:TextBox ID="TextBox1" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox2" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox3" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox4" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox5" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox6" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox7" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox8" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox9" runat="server" Style="position: relative"></asp:TextBox> <asp:TextBox ID="TextBox10" runat="server" Style="position: relative"></asp:TextBox> </div> <input type="button" value="check" onclick="return check()" /> <script type="text/javascript" > function checkNull() { var status=true; var inputs =document.getElementById("text").getElementsByTagName("input"); for(var i=0;i<inputs.length;i++) { if(inputs[i].value!="" ) { status=false; } } return status; } function check() { if(checkNull()) { alert("不能全部空"); return false; } } function trim(strText) { return strText.replace(/^\s+|\s+$/g, ''); } </script> </form> </body></html>