function getScript(file,init,pars){

var gUrl = "js/yui/";
var gLoad = gUrl + file + ".js";
var objTransaction = YAHOO.util.Get.script(gLoad,
											{ onSuccess: function() {
													var callback = eval(init);
													callback(pars);
												}
                                            });
}       

                                  
//objTransaction will be an object with a single field, tId, 
//which is a unique identifier of the transaction following the pattern
//"q0", "q1", "q2"..."qn".