Checking for existance of an image 1

[dle46163]

Hi!

I'm messing with the following code:

function check(){
var connect_img=new Image();
connect_img.onload=good_connect;
connect_img.onerror=bad_connect;
connect_img.src="

http://url/test.gif"

}

checkconnect=setInterval('check()',10000);

For the lines:
connect_img.onload=good_connect;
connect_img.onerror=bad_connect;

good_connect and bad_connect are functions that simply kick back a javascript alert.

While I'm testing for the existance of an image I'm actually testing to see if an internet connection is up and running...Everything works like it should when I first launch the script. However, if I unplug the ethernet cable to my pc while the script runs, the alert state doesn't change like I think it should. I thought defining the variable connect_img each time the function is called would do the trick but maybe I'm just not doing it right. Any thoughts would be great!

-dle

 

[tsuji]

[tt]function check(){
var connect_img=new Image();
connect_img.onload=good_connect;
connect_img.onerror=bad_connect;
[blue]//one form of solution
var surl="

http://url/test.gif";

var sfx=(/\?/.test(surl))?"&":"?";
connect_img.src=surl+sfx+(new Date()).getTime();[/blue]
}[/tt]

 

[dle46163]

Very nice, thank you!