javascript validation

Hi all.

I have a slite problem with javascript

Lets say, i have variable, that are string

Code:

---

var = "1234567890abced"

---

And i need to check on click event, for textbox, if the pressed key matches some of the chars inside our string variable.

Can someone help me out at this?

Hello

if you want to check only one char I prefer this way more than using regExp

HTML Code:

---

<script type="text/javascript">
var fineChars = '123456abcdef';
function checkChar(inputField)
{
  var pressedChar = inputField.value.substring(inputField.value.length - 1, inputField.value.length);
  if (fineChars.indexOf(pressedChar) == -1) {
        var newValue = inputField.value.substring(0, inputField.value.length - 1);
        inputField.value = newValue;
  }
}
</script>
<input type="text" onkeyup="checkChar(this)" />

---

regards :)

Feras Jobeir

Hello

If you want to check a char only, I prefer to try this more that using RegExp

HTML Code:

---

<script type="text/javascript">
var fineChars = '123456abcdef';
function checkChar(inputField)
{
  var pressedChar = inputField.value.substring(inputField.value.length - 1, inputField.value.length);
  if (fineChars.indexOf(pressedChar) == -1) {
        var newValue = inputField.value.substring(0, inputField.value.length - 1);
        inputField.value = newValue;
  }
}
</script>
<input type="text" onkeyup="checkChar(this)" />

---

regards :)

Feras Jobeir

Tnx for your replys guys, but i managed to do this on my own..

This is how i did it:

Code:

---

onkeyup="input_res(this,'abC chars to be allowed')


  function input_res(object,validation){
                var result = "";
                for (i=0; i < object.value.length; i++) {
                    x = object.value.charAt(i);
                    if (validation.indexOf(x,0) != -1) {
                        result += x;
                    }
                }
                object.value = result
            }

---

Good luck to everyone