javascript 使用 struts html 标签时，如何使用文本框的属性属性获取文本框的值？有没有其他方法可以获得价值？
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While using struts html tags, How do I get the value of a textbox using its property attribute? Is there any other way to get the value?
提问by Rajaah
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值进行验证...请帮我解决这个问题...
回答by Reddy
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>
回答by Shashi
Before reading next line, please install good web inspector. e.g.
在阅读下一行之前，请安装好的网络检查器。例如
and inspect the source
并检查来源
Or you can view the source.
或者你可以查看源码。
1. document.getElementsByName("userName")[0].value;
2. document.getElementById("userName").value;
3. document.forms["loginform"]["userName"].value
