how to use javascript in asp like html my html code and asp code are below

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Me Have the following code the html code work properly in htmlpage but the asp code not working in asp page.
///html code
<body>
<script>
function changeImage() {
element = document.getElementById('myimage');
if (element.src.match("loginm")) {
element.src = "images/login.jpg";
}
else {
element.src = "images/loginm.png";
}
}
</script>

<img id="myimage" önclick="changeImage()"
src="images/loginm.png" width="100" height="180">

Click the light bulb to turn on/off the light

</body>

///asp.net code
<head>
<script>
function changeImage() {
element = document.getElementById('myimage');
if (element.src.match("loginm")) {
element.src = "images/login.jpg";
}
else {
element.src = "images/loginm.png";
}
}

</script>
</head>
<body>
<asp:Image ID="myimage" runat="server" onclick="changeImage()" src="images/loginm.png" />
</body>

Posted 10-Apr-14 20:26pm

Mian Sahib Jan

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Murugesan22 11-Apr-14 2:35am

Post on error

Murugesan22 11-Apr-14 2:36am

try to add form in aspx page

1 solution

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Murugesan22 · Answer 1 · 2014-04-10T20:37:00

try this,

Add form with runat="server"

C#

<head>
<script>
function changeImage() {
element = document.getElementById('myimage');
if (element.src.match("loginm")) {
element.src = "images/login.jpg";
}
else {
element.src = "images/loginm.png";
}
}
 
</script>
</head>
<body>
 <form id="form1" runat="server">
<asp:image id="myimage" runat="server" onclick="changeImage()" src="images/loginm.png" xmlns:asp="#unknown" />

</body> </head>