在使用struts html标记时，如何使用属性属性获取文本框的值?还有其他方法来得到这个值吗?

    function validate(){
    var username = document.getElementByProperty("userName").value;
    var password = document.getElementByProperty("passWord").value;
    if((username == null ||username =='') || (password == null||password=='')){
     x=document.getElementById("error");
     x.innerHTML = "Username or Password Cannot Be Blank";
    else{
       document.getElementById("loginform").submit();
    }


    <form id="loginform" action="login.do" method="post">
    UserName:<html:text property="userName"></html:text>
    PassWord:<html:password property="passWord"></html:password>
    <html:button onclick="validate()"></html:button>
    </form>

the above code is not working and I am unable to get the values in textbox for validation... Please help me out in this issue...

上面的代码不起作用，我无法在文本框中获取验证的值…请帮我解决这个问题……

2 个解决方案

#1

function validate(){
    var username = document.getElementById("userName").value;
    var password = document.getElementById("passWord").value;
}


<form id="loginform" action="login.do" method="post">
    UserName:<html:text property="userName" styleId="userName"></html:text>
    PassWord:<html:password property="passWord" styleId="passWord"></html:password>
    <html:button onclick="validate()"></html:button>
</form>

#2

Before reading next line, please install good web inspector. e.g.

在阅读下一行之前，请安装好网络检查器。如。

Firebug in Firefox

Firefox中的Firebug

Web Inspector in Chrome

网络督察铬

IE Web Inspector

即网络督察

and inspect the source

并检查源

Or you can view the source.

或者你可以查看源代码。

   1. document.getElementsByName("userName")[0].value;
   2. document.getElementById("userName").value;
   3. document.forms["loginform"]["userName"].value