This a UK style of date validation. This can be changed to cater US style as well. Add this script in the HEAD tag of HTML Page
<SCRIPT type=text/javascript>
//This function is used to validate date in the format dd/mm/yyyy (U.K. style)
//dtControl is the client id of the control which contains the date
function validateDate(dtControl)
{
var input = document.getElementById(dtControl)
var validformat=/^\d{1,2}\/\d{1,2}\/\d{4}$/ //Basic check for format validity
var returnval=false
if (!validformat.test(input.value))
alert('Invalid Date Format. Please correct.')
else{ //Detailed check for valid date ranges
var dayfield=input.value.split("/")[0]
var monthfield=input.value.split("/")[1]
var yearfield=input.value.split("/")[2]
var dayobj = new Date(yearfield, monthfield-1, dayfield)
if ((dayobj.getMonth()+1!=monthfield)||(dayobj.getDate()!=dayfield)||(dayobj.getFullYear()!=yearfield))
alert('Invalid Day, Month, or Year range detected. Please correct.')
else
{
returnval=true
}
}
if (returnval==false) input.focus()
return returnval
}
</SCRIPT>
This can be set to work on client side now. For example, use this function on blur of a text box as:
<asp:TextBox ID="m_txtDate" runat="server" onBlur="validateDate('m_txtDate')"></asp:TextBox>
Add this code in your aspx page. Hope this works! Cheers
