Validate phone number

tektipsismyfavorite · Jun 1, 2006

I am working on a phone number validator and have an input that has maxChars = 12.

The format i'm going for is 999.999.9999

There's also a part that validates if it's a numeral.

I've tried this

called by onkeypress="return doPhone(this.value, event, 0)")

Code:

function doPhone(currv, evt, decimal){
	evt = (evt) ? evt : event;
    var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode :
        ((evt.which) ? evt.which : 0));
    if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode != 46) {
        return false;
    }
    if (charCode == 46) { 
        if (decimal == 0) {
            return false;
        } else {
         if (currv.indexOf(".") != -1) {
             return false;
         }
     }
 } else if (currv.indexOf(".") != -1) {  
     var s = currv.substring(currv.indexOf("."));
  if (s.length > decimal) {
   return false;
  }
 }
	if (charCode == 10){
		var num = document.moreinfo.cell.value;
		var len = num.length - 1;
		if(document.moreinfo.cell.value.length == 4 || document.moreinfo.cell.value.length == 8){
			document.moreinfo.cell.value = num.substring(0,len);
		}
		return true;
	} else {
		if(document.moreinfo.cell.value.length == 3 || document.moreinfo.cell.value.length == 7){
			document.moreinfo.cell.value += ".";
		}
		return true;
	}
}

The problem i'm having is after the last ELSE right before the last return true.

For some reason if I enter 4 characters, it puts the "." between the 3rd and 4th character, like it should, but then it won't let me type any more numbers. it's like the field ends after it has 5 characters in it. What's goin on?

prosper · Jun 1, 2006

<html>
<head>
<script lang="javaScript">
function doPhone(currv, evt, decimal){
evt = (evt) ? evt : event;
var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode :
((evt.which) ? evt.which : 0));
if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode != 46) {
return false;
}
if (charCode == 46) {
if (decimal == 0) {
return false;
} else {
// if (currv.indexOf(".") != -1) {
// return false;
// }
}
}
if (charCode == 10){
var num = document.moreinfo.cell.value;
var len = num.length - 1;
if(document.moreinfo.cell.value.length == 4 || document.moreinfo.cell.value.length == 8){
//alert("a");
document.moreinfo.cell.value = num.substring(0,len);
}
return true;
} else {
if(document.moreinfo.cell.value.length == 3 || document.moreinfo.cell.value.length == 7){
//alert("b");
document.moreinfo.cell.value += ".";
}
return true;
}
}
</script>
</head>
<body>
<form name="moreinfo">
<input type="text" name="cell" onkeypress="return doPhone(this.value, event, 0)">
</form>
</body>
</html>

tektipsismyfavorite · Jun 1, 2006

something about that wasn't working, but i played with it, and removing those lines did help. This is what I ended up with:

Code:

function doPhone(currv, evt, decimal){
    evt = (evt) ? evt : event;
    var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode :
        ((evt.which) ? evt.which : 0));
    if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode != 46) {
        return false;
    }
    if (charCode == 46) {
        if (decimal == 0) {
            return false;
        }
 	}
	if((document.moreinfo.cell.value.length == 3 || document.moreinfo.cell.value.length == 7) && (charCode != 10 && charCode != 8)){
		document.moreinfo.cell.value += ".";
	}
	if(charCode == 10 || charCode == 8){
		var num = document.moreinfo.cell.value;
		var len = num.length;
		len = len - 1;
		if(document.moreinfo.cell.value.length == 5 || document.moreinfo.cell.value.length == 9){
			document.moreinfo.cell.value = num.substring(0,len);
		}
	}
	return true;
}

This should be customizable to any phone number format, if i'm not mistaken. anyway, thanks a lot for the help.

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Validate phone number

tektipsismyfavorite

Technical User

prosper

Programmer

tektipsismyfavorite

Technical User

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