[mishinaelle]

а вот так:
function PhotoCliper(){

this.bgColor = 0;
}

PhotoCliper.prototype = new MovieClip();

PhotoCliper.prototype.setURL = function (u) {

/*
mcLoader1 = new MovieClipLoader();
mcLoader1.loadClip(u, innerMovie);
loadListener = {};
mcLoader1.addListener( loadListener );

mcLoader1.onLoadComplete = function( mc ) {
mc.play();
*/

trace(this.bgColor);

}

Object.registerClass("PhotoCliper", PhotoCliper);

_root.attachMovie("PhotoCliper", "obj", 1);
obj.setURL("http://www.lab.lissi.ru");

stop();