| Author: Anand 05 Jul 2008 | Member Level: Bronze | Rating:  Points: 0 |
Spliting is the only way.
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| Author: chandramohan 05 Jul 2008 | Member Level: Gold | Rating: Points: 1 |
var valid_extensions = /(.jpg|.jpeg|.gif)$/i;
//
function CheckExtension(fld)
{
if (valid_extensions.test(fld.value)) return true;
alert('The selected file is of the wrong type.');
fld.select();
fld.focus();
return false;
}
Then, you can call it as follows:
<form onsubmit="return CheckExtension(this.elements['fileupload'])">
<fieldset>
<input type="file" name="fileupload" size="40"
onchange="return CheckExtension(this)">
</fieldset>
</form>
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| Author: Aravind 05 Jul 2008 | Member Level: Gold | Rating: Points: 3 |
function fnCheckExt(fileName)
{
var strExtn = fileName.value.substr(fileName.value,fileName.value.lastIndexOf(".")+1);
alert("Your file is of extension : "+ strExtn);
}
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| Author: kunal badgujar 08 Jul 2008 | Member Level: Gold | Rating: Points: 6 |
hi..
try following code..
<script language="JavaScript">
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();
}
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| Author: Nithya 08 Jul 2008 | Member Level: Gold | Rating: Points: 4 |
hi...
in a javascript function you can create like this means it will check the file extension...
if((document.form1.upload.value.lastIndexOf(”.jpg”)==-1) {
alert(”Please upload only .jpg extention file”);
return false;
}
Explain: lastIndexOf will return the index of the last occurrence of the specified search argument. If not found, -1 will return.
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| Author: sridhar 09 Jul 2008 | Member Level: Silver | Rating: Points: 6 |
//********************
Function For ValidatingFileUploadImage *************************
function onSubmitForm()
{
var formDOMObj = document.getElementById('FileUpload1').value;
if (formDOMObj == "")
{
error="";
return error;
}
else
{
var strLocation =document.getElementById'FileUpload1').value;
var strFile = strLocation.split(".");
var arrFileExtension = new Array(2)
arrFileExtension[0] = "JPG";
arrFileExtension[1] = "GIF";
arrFileExtension[2] = "PNG";
var len = arrFileExtension.length;
var x=0;
for (x=0; x<len; x++)
{
if (strFile[strFile.length - 1].toUpperCase() == arrFileExtension[x].toUpperCase())
{
error ="";
return error;
}
}
error="The selected file format is not supported.Only (jpg,gif,png)fromats are supported \n";
return error;
}
}
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