Validation for Email and URL using in javascript

By: Suresh Dasari Sep 20, 2010

Introduction:

Here I will explain how to validate the textbox and whether that textbox contain valid email or url address using asp.net

Description:

Here I will explain how to validate the textbox and whether that textbox contain valid email or url address using asp.net.

First write the following code in aspx page

html xmlns="http://www.w3.org/1999/xhtml">

<title>Untitled Page</title>

function IsValidUrl() {

var textbox = document.getElementById('<%=txt1.ClientID %>');

//Regular Expression for Url validation.

var url = /^http[s]*\:\/\/[wwW]{3}\.+[a-zA-Z0-9]+\.[a-zA-Z]{2,3}.*$|^http[s]*\:\/\/[^w]{3}[a-zA-Z0-9]+\.[a-zA-Z]{2,3}.*$|http[s]*\:\/\/[0-9]{2,3}\.[0-9]{2,3}\.[0-9]{2,3}\.[0-9]{2,3}.*$/;

var email = /\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;

//Checks with the control value.

if (textbox.value.length > 0) {

if ((url.test(textbox.value))||(email.test(textbox.value)))

{

return true;

}

else {

//If the condition not satisfied shows error message.

alert("Please enter valid URL or Email");

return false;

}

else {

alert("please enter text");

return false;

}

}//End of function IsValidUrl.

</script>

</head>

<body>

<div>

<asp:TextBox ID="txt1" runat="server"/>

<asp:Label ID="lbltext" runat="server"> <span style= "color:Red"> URL like http://www.aaa.com </span></asp:Label>

<br />

<asp:Button ID="btnsubmit" Text="Submit" runat="server" OnClientClick="javascript:IsValidUrl();" />

</div>

</form>

</body>

</html>

Now run the page you will get validation for textbox

For more JavaScript validations check these links

http://www.aspdotnet-suresh.com/2010/10/javascript-validations-for-emailphone.html

http://www.aspdotnet-suresh.com/2010/10/javascript-validations-to-validate-form.html

I hope it helps you

Download sample code attached

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1 comments :

Mubashir Ahmed Shaikh said...: Not working. I have tested with http://www.abc.com; November 14, 2012 at 10:12 AM

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