📄 demo_reqfieldvalidator.aspx

📁 W3Schools tutorial..web designing
💻 ASPX
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<html>
<body>

<form name="ctl00" method="post" action="demo_reqfieldvalidator.aspx" onsubmit="javascript:return WebForm_OnSubmit();" id="ctl00">
<div>
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
<input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJODc2MzU2NDA2ZGT/NLBLkNtegJXwX/n3prSZO2PlTw==" />
</div>

<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['ctl00'];
if (!theForm) {
    theForm = document.ctl00;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
//]]>
</script>


<script src="../WebResource.axd@d=4_tD1fQpKNRAgETimjNH_g2&t=633385606641372605" type="text/javascript"></script>


<script src="../WebResource.axd@d=ZkG9XdC9c0XpqHQQuwpxZ5u3CDlcmfS00Rh1ymMa-Go1&t=633385606641372605" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
function WebForm_OnSubmit() {
if (typeof(ValidatorOnSubmit) == "function" && ValidatorOnSubmit() == false) return false;
return true;
}
//]]>
</script>

Name: <input name="name" type="text" id="name" />
<br />
Age: <input name="age" type="text" id="age" />
<br /><br />
<input type="submit" name="ctl01" value="Submit" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl01&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, false, false))" />
<br /><br />
<span id="ctl02" style="color:Red;visibility:hidden;">The name field is required!</span>

<script type="text/javascript">
//<![CDATA[
var Page_Validators =  new Array(document.getElementById("ctl02"));
//]]>
</script>

<script type="text/javascript">
//<![CDATA[
var ctl02 = document.all ? document.all["ctl02"] : document.getElementById("ctl02");
ctl02.controltovalidate = "name";
ctl02.evaluationfunction = "RequiredFieldValidatorEvaluateIsValid";
ctl02.initialvalue = "";
//]]>
</script>

<div>

	<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWBALQz5vhBAL7uPQdAtCCr6oGAqLAiY0LI5IKiUuk0/ebJAp7SD5UBoQsv1Y=" />
</div>

<script type="text/javascript">
<!--
var Page_ValidationActive = false;
if (typeof(ValidatorOnLoad) == "function") {
    ValidatorOnLoad();
}

function ValidatorOnSubmit() {
    if (Page_ValidationActive) {
        return ValidatorCommonOnSubmit();
    }
    else {
        return true;
    }
}
// -->
</script>
        </form>

</body>
</html>
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