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test for graphics

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Sep 25.2011

The code below was supposed to test for a graphic.
Apparently it’s not working.
Any help in fixing this would be appreciated.

[CODE]

var jpg = new Image();
jpg.src = “$path/members/$user/graphics/” + db_id + “.jpg”;
var gif = new Image();
gif.src = “$path/members/$user/graphics/” + db_id + “.gif”;

if(jpg.src){
var pict =”<img src=’$sec_owner_url/members/$user/graphics/” + db_id + “.jpg’ width=’60’> “;
}
else if(gif.src){
var pict =”<img src=’$sec_owner_url/members/$user/graphics/” + db_id + “.gif’ width=’60’> “;
}
else{ var pict=””; }

[CODE]

to post a comment
JavaScript

1 Comments(s) ↴

Copy linkTweet thisAlerts:
@Logic_AliSep 25.2011 — I suppose you could test for existence using AJAX requests, but since you're going to download the detected image, I would use [I]onload[/I] and [I]onerror[/I] handlers:&lt;script type='text/javascript'&gt;

var imgs =[ 'pic1.gif', 'pic2.gif', 'pic3.gif', 'pic4.gif' ];

function findImage( pics, func )
{
var iObj = new Image();

if( pics.length )
{
iObj.onload = function(){ func( pics[ 0 ] ) };

<i> </i>iObj.onerror = function(){ pics.splice( 0, 1 ); findImage( pics, func ); } ;

<i> </i>iObj.src = pics[ 0 ];
} <br/>
}

function useImage( src ) /* Function that uses the first image found */
{
alert( 'First image found was ' + src ); <br/>
}

findImage( imgs, useImage );

&lt;/script&gt;
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