java script validation

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Hello All,

i am taking two textbox for password validation and in those textboxes, user can enter only alpha numeric value i.e [a-z/A-Z/0-9]. and user can't enter any special characters like @,!,$,# etc..

if any one knows about it then pls help...

Regards,

Raj

Posted 20-Sep-12 20:05pm

raj dhakad

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Vijay Walunj,Navi mumbai 21-Sep-12 2:33am

You need to make your condition test a regexp, not a string:

if(!/^[a-zA-Z0-9]+$/.test(name)){ ...
meaning:

^ -- start of line
[a-zA-Z0-9]+ -- one or more characters/numbers
$ -- end of line
or you could search for the inverse of that, which is "any non-accepted character":

if(/[^a-zA-Z0-9]/.test(name)){

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Harshad Kathiriya · Answer 1 · 2012-09-20T20:10:00

Hello

U can use the javascript validation for this.

function ValidateUserName(ControlID) {
var Pattern = /^[0-9a-zA-Z]*$/;
var ctrl = document.getElementById("txtPassword")
//var ctrl = ControlID == undefined ? : ControlID;
if (ctrl.value == '' || ctrl.value.search(Pattern) == -1) {
window.alert("Special character not allowed.");
ctrl.value = "";
return false;
}
return true;
}

Use this script and place the on keypress event.

Abhijit Parab · Answer 2 · 2012-09-20T20:13:00

Solution 2

Hi,
U can use regular expression validator for that....
And provide validation expression as

"[A-Za-z1-9][A-Za-z0-9]*"

Posted 20-Sep-12 20:13pm

Abhijit Parab

Vijay Walunj,Navi mumbai · Answer 3 · 2012-09-20T20:33:00

soln1:

XML

<script type="text/javascript">
    function validate() {
        var name = document.getElementById("name").value;
        var pattern = /^[A-Za-z0-9 ]{3,20}$/;
        if (pattern.test(name)) {
            alert(name +" has alphanumeric value");
            return true;
        } else {
            alert("Name is not valid.Please input alphanumeric value!");
            return false;
        }
    }
</script>

Ganesh Nikam · Answer 4 · 2012-09-20T20:34:00

Solution 4

hiii,
try this links
http://stackoverflow.com/questions/336210/regular-expression-for-alphanumeric-and-underscores[^]

Posted 20-Sep-12 20:34pm

Ganesh Nikam

Updated 24-Sep-12 23:42pm

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java script validation

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