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Hello Friends,
I am doing validation on my form ,i have a problum.
i have to validate a textbox like this that it will take only alphnumeric values in between 6 to 8 digits.
like 12345a or asdgfg67
Thanks In Advance
Updated 5-Dec-10 19:16pm

Use Filter Textbox Extender of Ajax for only alphanumeric and Range validation for Max and min value
<cc1:FilteredTextBoxExtender ID="txtMobile_FilteredTextBoxExtender"
                 runat="server" Enabled="True" TargetControlID="txtMobile"

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:RangeValidator ID="RangeValidator1" runat="server"
                ControlToValidate="TextBox1" ErrorMessage="RangeValidator" MaximumValue="8"
Here is the Java script..Hope this works

function ValidateAlphaNumeric(ctrlID, ctrlName)
var password = document.getElementById(ctrlID).value;

if(password != "")
var checkNumber=0,checkAlpha=0;

for(count=0 ; count < password.length ; count++)
if((password.charAt(count) <= "z" && password.charAt(count) >= "a") ||(password.charAt(count) <= "Z" && password.charAt(count) >= "A"))
checkAlpha = 1;
else if((password.charAt(count) <= "8" && password.charAt(count) >= "6"))
checkNumber = 1;
return true;
I think when you get the input of password,
first, validate the length between 6-8;
second,validate each char of the input-string, using regular expressions '\w'.
good luck!

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