I said "and by using a temporary var doesn't have to check if it was added
or not."
This is wrong. It's absolutley necessary to test if it was added before:
var dummy = "&uuu";
*if (this.src.match(dummy + "$") != dummy)* {
this.src = this.src + "&uuu";
}
If you don't do so you will get a loop of requests to the server. To test
try a layer with an invalid address.
Pietro Ianniello
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