With javascript

Question

i want to validate login page using java script function. i take one label button for displaying message and two text box for username and password and one button for "Login" .

当用户在未输入用户名和密码的情况下点击“Login”纽顿时,电文将显示在标签控制中。因此,如何检查javascript功能中的文字箱值以及如何改变胶卷的价值。我在奥克顿称这一职能。我将这一职能放在布顿· OnClientClick活动上,但这不是什么工作。

Answer 1

With javascript

简单的例子

var lblElement = document.getElementById("yourlabelsid");

lblElement.innerHtml("Your new updated text in the label");

But try to use a javascript libray like jquery, it has a lot of benefits and ease. Generically on jquery, to change the markup of any element, we use

$("#theselector").html("the new markup inside the markup");

In case input elements, we use .val(); $("#mytextbox").val("the value in the textbox");

根据您的描述,你想把字句改为简单的例子。

标签

<label id="lbl_name">Name:</label>

Use

$("#lbl_name").html("the updated html");

页: 1

Answer 2

更好地使用作为人使用的蚊帐,需要外地验证人控制,而不是发挥特别的javascript功能来处理这一问题。

Answer 3

var msgLabel= document.getElementById( <%=lblMessage.ClientID %> );
msgLabel.innerHTML = "Your message here";

Answer 4

<script language="javascript">

    function check() {
     var a = document.getElementById( <%=label.ClientID%> );
     var b = document.getElementById( <%=textbox.ClientID%> ).Value;
     var c = document.getElementById( <%=textbxpassword.ClientID%> ).Value;

        if (b  == "" &&  c == "") 
        {
             a.innerHTML = "your text here";
             alert(a.innerHTML);
        }
     }

</script>

With javascript

友情链接