Typically, required field validation occurs on button clicks. However, I would like the alert to be displayed when moving to the next TAB index instead. How can I achieve this using JavaScript and ASP.NET?
Typically, required field validation occurs on button clicks. However, I would like the alert to be displayed when moving to the next TAB index instead. How can I achieve this using JavaScript and ASP.NET?
Give this a shot:
Suggestion:
<script type="text/javascript">
function checkInput(input)
{
if(input.value=="")
{
alert("Please fill in the required field");
input.focus();
}
}
</script>
Implementation:
<asp:TextBox ID="TextBox1" runat="server" onblur="checkInput(this)"></asp:TextBox>
One way to approach this is by using javascript, as shown in the following example from this discussion thread
Within the Page_Load function,
TextBox1.Attributes.Add("onblur", "ValidatorOnChange(event);")
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