Disallow a path with the file name that contains a non-english characters

Hi, how to disallow a path with the file name that contains a non-english characters using javascript.

Regards.
Sindibad_123Asked:
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saritapatelSoftware developerCommented:
if (/[^a-z\s&'-\.]/gi.test(which.value)) {
alert ("Only alpha characters, spaces, apostrophe, hyphen, full stop and & are valid in this field");

Now that you have allowed spaces, you really need to strip leading spaces and check the field length to prevent just spaces being entered:-

<script type = "text/javascript">
function checkField(which) {
nm = which.value;
nm = nm.replace(/^\s+/,""); // strip leading spaces
if ((/[^a-z\s&'-\.]/gi.test(nm)) || (nm.length == 0)) {
alert ("Only alpha characters, space, apostrophe, hyphen, full stop and & are valid in this field");
which.value = "";
which.focus();
return false;
}
}
</script>

If you want you can refine this further to ensure that the field contains at least 2 alpha characters, thus weeding out ------, &&&&& and ....... (or similar silly entries)


<script type = "text/javascript">
function checkField(which) {
nm = which.value;
nm = nm.replace(/^\s+/,""); // strip leading spaces
nm1 = nm.replace(/[^a-z]/gi,""); // strip non-alpha chars
if ((/[^a-z\s&'-\.]/gi.test(nm)) || (nm.length == 0) || (nm1.length < 2)) {
alert ("Only alpha characters (2 minimum), space, apostrophe, hyphen, full stop and & are valid in this field");
which.value = "";
which.focus();
return false;
}
}
</script>
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Sindibad_123Author Commented:
>Now that you have allowed spaces, you really need to strip leading spaces

Thank you, but why I need to strip spaces?!
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Gurvinder Pal SinghCommented:
his full sentence reads
<<Now that you have allowed spaces, you really need to strip leading spaces and check the field length to prevent just spaces being entered:>>

Did you tried my solution?
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Sindibad_123Author Commented:
>.Did you tried my solution?

No, your links talks about path validation, this is not what I'm talking about.

>Now that you have allowed spaces, you really need to strip leading spaces and check the field length to prevent just spaces being entered

My quest still stands, why I need to remove white spaces from a path and file name?! its allowed in Windows os.
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Terry WoodsIT GuruCommented:
Windows doesn't allow leading or trailing spaces in filenames, so it makes sense to remove them.
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