Skip to main content

JS function to check the extension of file in the url

Javascript function to check the extension of file in the url. This is useful for setting filters for file control. the function and it sample use is given below:

function checkFileType(str){
file_name=str.replace(/^.*(\\|\/|\:)/, '');
ext=file_name.split('.').pop().toLowerCase();
if( ext!= 'doc' && ext!= 'jpg' && ext!= 'jpeg' && ext!= 'png' && ext!= 'gif' && ext!= 'pdf'){
alert("Selected file "+file_name+" is invalid, Please upload file of type doc,jpg,jpeg,pdf,gif or png. ");
document.getElementById('file').value='';
}
}


Sample usage

<input id="file" name="file" onchange="javascript:checkFileType(this.value);" type="file" />

Labels:

Comments

Post a Comment

Popular posts from this blog

Strange problem occured while trying to create a CSV file using PHP Script - The file is not seen on FTP but can download using file's absolute path url

Strange problem occured while trying to create a CSV file - The file is not seen on FTP but can download using file's absolute path url Last day I came across a strange problem when I tried to create a csv file on therver using a PHP script. the script was simply writing a given content as a csv file. The file will be created runtime. What happened was, The script executed fine, file handler for new file was created and contents was wrote into the file using fwrite and it returned the number of bytes that was written.
Post a Comment
Read more

How to get the Query string of a URL using the Javascript (JS)?

JS function get the Query string of a URL or value of each parameter using the Javascript(JS)? If you want to get your current page's url var my_url=document.location; to get the query string part of the url use like this: var my_qry_str= location.search; this will return the part of the url starting from "?" following by query string Lets assume that your current page url is http://www.crozoom.com/2013/page.html?qry1=A&qry2=B then the location.search function will return " ?qry1=A&qry2=B " to exclue "?", do like this:
Read more


Urgent Openings for PHP trainees, Andriod / IOS developers and PHP developers in Kochi Trivandrum Calicut and Bangalore. Please Send Your updated resumes to recruit.vo@gmail.com   Read more »
Member
Search This Blog