);
						}
						doXHR(theObjURL, function(dataRet) {
							if(dataRet) {
								var typedArr = new Uint8Array(dataRet);
								if(typedArr.length === 4 && typedArr[0] === 69 && typedArr[1] === 69 && typedArr[2] === 69 && typedArr[3] === 69) {
									sameOriginSupport = 0;
									callback(true);
								}else {
									sameOriginSupport = 1;
									callback(false);
								}
							}else {
								sameOriginSupport = 1;
								callback(false);
							}
						});
					}
				})(function(valRet) {
	