Check if image file exists?

...dynamically when using input type=file

[Noisehag]

I've been on the hunt for a simple little function that will detect whether or not an image file exists when a user selects the file from their hard drive or types in the location. Just need it to alert that there is no such file if it truly does not exist. IE only.

Any takers? Bernard, you out there? :)

[Bernard Marx]

Yes..and for quite a while now too.

I think the onerror event handler is what you want. Create an image object, associated with a local variable...

var img = new Image() 
img.onload = function(){imageExists(true)} 
img.onerror = function(){imageExists(false)} 
img.src = input_src_string 
function imageExists(exists) 
{ 
  if(exists) 
    //do this 
  else 
   // do that 
} 

[Noisehag]

Thank you Bernard. I'll have a go at it in a few days and let you know. :)