LiewCF.com

Your solution works, but:
When a file with the extention JPG or GIF is used, it does not pass the test... I have got this case on my website. A fix to your solution might be:

function checkExt(formObj){
var filename = formObj.fileToUpload.value;
var filelength = parseInt(filename.length) - 3;
var fileext = filename.substring(filelength,filelength + 3);

// Check file extenstion
if (fileext.toLowerCase() != “gif” && fileext.toLowerCase() != “jpg”){
alert (”You can only upload gif or jpg images.”);
formObj.fileToUpload.focus();
return false;
}
formObj.submit();
}

With this anything like
myphoto.JPG
myphoto.Jpg

Will be valid :)

Hope this can be of help to someone.

What about this?

function isFileExtInRange (filePath, range) {
var extArr = range.split(" ");
for (var i=0; i<extArr.length; i++) {
var actualLastIndex = filePath.toLowerCase().lastIndexOf(extArr[i]);
var assertedLastIndex = filePath.length - extArr[i].length;
/* **************** For Test **************************
alert("File path:" + filePath + "\n"
+ "extArr[" + i + "]:" + extArr[i] + "\n"
+ "actualLastIndex:" + actualLastIndex + "\n"
+ "assertedLastIndex:" + assertedLastIndex);
********************************************* */
if (actualLastIndex == assertedLastIndex) return true;
}
return false;
}

Sorry, this page isn't well formatted, and I forget to explain the code "range.split(" ")"

The above code is supposed to be used like this:

isFileExtInRange("E:\Makiko_Fly\Resources\myPic.jpg", ".jpg .jpeg .bmp .png")

Nice JS .. but this will not work if the name is like file.jpg.zip
Here is better solution fom another site


function checkExt(formObj){
var filename = formObj.fileToUpload.value;
var filelength = parseInt(filename.length) - 3;
var fileext = filename.substring(filelength,filelength + 3);

// Check file extenstion
if (fileext != "gif" && fileext != "jpg"){
alert ("You can only upload gif or jpg images.");
formObj.fileToUpload.focus();
return false;
}
formObj.submit();
}


Thanks

- http://www.PDFonFly.com

Hiiiii friends , I wanna know how to check the complete path browse in the file field in javascript ????
check is path is valid or not???

hi ,

i think there is some small problem :) because there ) missing. it is like this :

if((document.form1.upload.value.lastIndexOf(”.jpg”)==-1) {

but i think i must be like this ;

if((document.form1.upload.value.lastIndexOf(”.jpg”)==-1) ) {

isnt it ? ;)

I want a javascript to check for a valid CSV file and not just the extension. I mean if somebody renames any exe into CSV and tries to upload, the script should not allow.

I don't read spanish, here is translation of babelfish:

this good that script but gustaria me that you place scripts as the one to load a file and to insert it in a field blob of a data base

I assume you want me to write a file that upload the file and put in database? Sorry, javascript does not do that. You need to use PHP, ASP or other server side language.

hola Liew.

esta bueno ese script pero me gustaria que coloques scripts como la de cargar un archivo e insertarlo en un campo blob de una base de datos

Ronin, you are right. Thanks :)
There is a better Javscript function at:
http://www.experts-exchange.com/Web/Web_Languag...

i could upload a file called "not.a.jpg.png" and it would work. :twisted: