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function getImgContainToRectConfig (outerWidth, outerHeight, imgWidth, imgHeight) => {
	let newWidth = outerWidth;
	let newHeight = outerWidth * imgHeight / imgWidth;
	if (newHeight > outerHeight) {
	  newHeight = outerHeight;
	  newWidth = outerHeight * imgWidth / imgHeight;
	}
	return {
		top: (outerHeight - newHeight) / 2,
		left: (outerWidth - newWidth) / 2,

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function preventDefault (event) {
	window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty()
	event.preventDefault && event.preventDefault()
	event.stopPropagation && event.stopPropagation()
}
function getParam(clientX, clientY, startX, startY) {
	let xOffset = clientX - startX
	let yOffset = clientY - startY

	return {

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function escapeHtml(code) {
  var escapeMap = {
    "&": "&",
    "<": "&lt;",
    ">": "&gt;",
    '"': "&quot;",
    "'": "&#x27;",
    "`": "&#x60;"
  };
  var escaper = function (match) {

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function isMobile(agent) {
  return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent);
};

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// 移动数组中指定索引的位置
function moveItems(arr, indexFrom, indexTo) {
	arr.splice(indexTo, 0, arr.splice(indexFrom, 1)[0]);
	return arr;
}
moveItems([0,1,2,3,4,5,6,7,8,9],0,7);

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var randomFlag = (new Date().getTime()*100000 + Math.ceil( Math.random() * 100000 )).toString(36);

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//GCJ-02转换BD-09  
function GCJTobaidu($lat, $lng){
    var $v = Math.PI * 3000.0 / 180.0;
    var $x = $lng;
    var $y = $lat;
    
    var $z = Math.sqrt($x * $x + $y * $y) + 0.00002 * Math.sin($y * $v);
    var $t = Math.atan2($y, $x) + 0.000003 * Math.cos($x * $v);
    
    return {

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/**
 * 加载JS
 */
function LoadScript(url, callback){
  var urls = typeof url === 'string' ? [url] : url;

  if (!Array.isArray(urls)){
    throw 'argument type error';
    return;

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// 判断输入值是否为NaN
function isNaN( input ){
  return input !== input;
}

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function isJSON( input ){
  var returns = true;
  try{
   JSON.stringify( input )
  } catch ( e ){
    returns = false;
  }
  return returns;
}
function isSameObj( objA, objB ){