Enter Folder Name

Source Code

<script language="javascript">
<!--
function new_onclick()
{
//validating whether the input is blank
if (document.ContactsFolder.txtFolder.value == "")
{
    alert("Please enter a name for New Folder.");
    document.ContactsFolder.txtFolder.focus();
    return false;
}
else
{
//validating whether the input contains any space or invalid characters
var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
var checkStr = document.ContactsFolder.txtFolder.value;
var allValid = true;

for (i = 0; i < checkStr.length; i++)
{
    ch = checkStr.charAt(i);
    for (j = 0; j < checkOK.length; j++)
        if (ch == checkOK.charAt(j))
            break;

        if (j == checkOK.length)
        {
            allValid = false;
            break;
        }
}

if (!allValid)
{
    alert("Please enter only letter,digit and underscore as the new name.");
    document.ContactsFolder.txtFolder.focus();
    return false;
}
else
{
    return true;
}
}
}
//-->
</script>

<html>
<head>
<title>Validating Input</title>
</head>
<body>

<form name="ContactsFolder">
<p><input type="text" name="txtFolder" size="20"> <input type="submit" name="submit"
value="ok" onClick="javascript:new_onclick()"> </p>
</form>

</body>
</html>

 

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Last modified: November 16, 2000