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Validating a length property

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Nov 12.2005

? I am writing a validation script for a small order form. I need to verify that the number is 5 digits long. The script below works except it does not recognize the length validation. I have tried (IDLen != 5) but that does just the opposite and won’t vaildate any length. Thanks for any help!

function validate(){

var IDLen = document.frmCustOrders.txtOrderID.length;
var ordID = parseInt(document.frmCustOrders.txtOrderID.value);

if (isNaN(ordID) == true) {
alert(“Order ID must be a number”);
document.frmCustOrders.txtOrderID.select();
return false;

}else if ((ordID < 1) || (ordID > 99999)) {
alert(“Order ID must be a number between 1 & 99,999”);
document.frmCustOrders.txtOrderID.select();
return false;

}else if (IDLen < 5) {
alert(“Order ID must be a 5 Digit number between 1 & 99,999”);
document.frmCustOrders.txtOrderID.select();
return false;
}else{
return true;
alert(“Order ID Good”);
}

Nasus

to post a comment
JavaScript

3 Comments(s) ↴

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@konithomimoNov 12.2005 — Few things:

  • 1. Instead of checking for NaN, I would just add:


    • onkeyup="this.value=this.value.replace(/D/,'')"

    to all of your inputs. That will allow only numbers to be inputed.

  • 2. Then make your function look like this:
    <i>
    </i>
    function validate()
    {
    var IDLen = document.frmCustOrders.txtOrderID.length;
    var ordID = parseInt(document.frmCustOrders.txtOrderID.value);

    if ((ordID &lt; 1) || (ordID &gt; 99999)) {
    alert("Order ID must be a number between 1 &amp; 99,999");
    document.frmCustOrders.txtOrderID.select();
    return false;
    }

    else if (IDLen &gt; 5)
    {
    alert("Order ID must be a 5 Digit number between 1 &amp; 99,999");
    document.frmCustOrders.txtOrderID.select();
    return false;
    }

    else
    {
    return true;
    alert("Order ID Good");
    }
    }
    • Copy linkTweet thisAlerts:
    @kinkNov 13.2005 — maybe this will help this o0ne works

    <script type="text/javascript">

    function afunction()

    {

    var nm = document.ti.nm.value;

    var nb = nm.length;

    if(nb > 0)bfunction();

    else

    alert("Please enter a first name");

    return(false);


    }

    </script>
    Copy linkTweet thisAlerts:
    @NasusauthorNov 13.2005 — The method of putting the value into a variable then using the length property worked great - Thanks for the help!!!!
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