Not sure if that was the answer you were after Francesco, the way I read your question was a bit different, and to do what I think you're trying to do you can use layer event listeners.. which will basically do what you want.<div>
<br></div><div>i.e loadstart and loadend events.</div><div><br></div><div><code> </div><div><div> layer.events.register("loadstart", layer, function() {</div><div> this.logEvent("Load Start");</div>
<div> });</div></div><div>or</div><div><div>layer.events.register("loadend", layer, function() {</div><div> this.logEvent("Load End. Grid:" + this.grid.length + "x" + this.grid[0].length);</div>
<div> });</div></div><div></code></div><div><br></div><div>Taken from </div><div><br></div><div><a href="http://dev.openlayers.org/releases/OpenLayers-2.11/examples/layerLoadMonitoring.html">http://dev.openlayers.org/releases/OpenLayers-2.11/examples/layerLoadMonitoring.html</a>
</div><div><br></div><div>which doesn't actually work but look at the source..</div><div><br></div><div>Toby</div><div><br><br><div class="gmail_quote">On 13 April 2012 15:18, Fernando Norte <span dir="ltr"><<a href="mailto:fernando@globalgeo.com.br">fernando@globalgeo.com.br</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">With Firebug and jQuery.<div>Identify the box of inputs with Firebug and try jQuery methods like .each() (for each input) .onChange() (to detect alterations in form).</div>
<div><br></div><div>Remember: OpenLayers is a JAVASCRIPT framework, so, javascript knowledge is gold!</div>
<div><br clear="all"><img><br><br>
<br><br><div class="gmail_quote">2012/4/13 <a href="mailto:francescoboccacci@libero.it" target="_blank">francescoboccacci@libero.it</a> <span dir="ltr"><<a href="mailto:francescoboccacci@libero.it" target="_blank">francescoboccacci@libero.it</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
i'm using OpenLayers.Control.LayerSwitcher and i would like to capture the<br>
switch layer event.. How can i do it?<br>
Thanks<br>
<br>
<br>
Faancesco<br>
<br>
<br>
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