Accept only number and one dot in js?

Question

I have this code which is not working:

function isWH(ele)
{
  var r=/\D$/i; // important: prevent space sa password
  if(r.test(ele.value))
  {
    alert("Please check your format");
    ele.value="";
    ele.focus();
  }
}


<input type="text" name="hei" class="textarea" value="<?php echo $hei?>"         onkeyup="isWH(this)" placeholder="e.g. 163"  onKeyDown="CountLeft(this.form.hei,this.form,5);" onKeyUp="CountLeft(this.form.hei,this.form,5);" />

the input text box should only accept numbers and one dot for example 1.123 or 12 like that .. in my code it only accept whole number. — 안젤라, Nov 05 '15 at 08:26
see : -> http://stackoverflow.com/questions/5570820/regex-allow-digits-and-a-single-dot — CodeLove, Nov 05 '15 at 08:29
Why is this tagged with php?, I mean sure, you're using php to echo a value, but the issue / question has nothing to do with php - I would also strongly recommend reading [how-to-ask](http://stackoverflow.com/help/how-to-ask) — Epodax, Nov 05 '15 at 08:33

Suyog · Answer 1 · 2015-11-05T09:07:35.803

3

Try following regex

<script>
$(function(){
    $('#hei').keypress(function(event) 
    {
        var charCode = (event.which) ? event.which : event.keyCode

        if (
            (charCode != 45 || $(this).val().indexOf('-') != -1) &&      // “-” CHECK MINUS, AND ONLY ONE.
            (charCode != 46 || $(this).val().indexOf('.') != -1) &&      // “.” CHECK DOT, AND ONLY ONE.
            (charCode < 48 || charCode > 57))
            return false;

        return true;
    });
});
</script>

HTML

<input type="text" name="hei" id="hei" class="textarea" value="<?php echo $hei ?>" 
placeholder="e.g. 163" onKeyDown="CountLeft(this.form.hei,this.form,5);" 
onKeyUp="CountLeft(this.form.hei,this.form,5);" />

Fiddle

edited Nov 05 '15 at 09:07

answered Nov 05 '15 at 08:27

Suyog

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its not working .sorry newbie function isWH(ele) { var r=/^-?\d+(?:\.\d+)?$/; // if(r.test(ele.value)) { alert("Please check your format"); ele.value=""; ele.focus(); } } – 안젤라 Nov 05 '15 at 08:29
this is because you are calling two functions `onkeyup` in wrong way – Suyog Nov 05 '15 at 08:36
@안젤라 try updated answer – Suyog Nov 05 '15 at 09:01

Accept only number and one dot in js?

1 Answers1