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can type textbox for number but that is correct date format using javascript
Updated 29-Aug-12 1:24am
Joan M 29-Aug-12 7:23am    
Could you clarify it a little bit?
Do you want to enter only numbers?
Do you want to check a date format?

Assuming that you want to check the input to textbox is a valid date, you can refer the below article
JavaScript Date Validation[^]
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Create a javascript function and call that on form submit event.
Try this:
<script type="text/javascript">
function checkdate(input){
    var validformat=/^\d{2}\/\d{2}\/\d{4}$/ //Basic check for format validity
    var returnval=false
    if (!validformat.test(input.value))
        alert("Invalid Date Format. Please correct and submit again.")
    else{ //Detailed check for valid date ranges
        var monthfield=input.value.split("/")[0]
        var dayfield=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 and submit again.")
    if (returnval==false)
    return returnval

<form onSubmit="return checkdate(this.mydate)">
<input type="text" name="mydate" />
<input type="submit" value="submit" /><br />
Valid date format: mm/dd/yyyy<br />
<input type="submit" value="submit" />

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    var date1 = new Date();
        var dob = document.getElementById('<%=txtDob.ClientID%>').value;
        var date2 = new Date(dob);
        var pattern = /^\d{1,2}\/\d{1,2}\/\d{4}$/; //Regex to validate date format (dd/mm/yyyy)
        if (pattern.test(dob)) {
            var y1 = date1.getFullYear(); //getting current year
//            var y2 = date2.getFullYear();
//            var y3 = y1 - y2;        
            return true;
        } else {
            alert("Invalid date format. Please Input in (dd/mm/yyyy) format!");
            return false;
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