vendor prefix

vendor prefix

// from http://davidwalsh.name/vendor-prefix
window.prefix = (function () {
  var styles = window.getComputedStyle(document.documentElement, ''),
	pre = (Array.prototype.slice
	  .call(styles)
	  .join('') 
	  .match(/-(moz|webkit|ms)-/) || (styles.OLink === '' && ['', 'o'])
	)[1],
	dom = ('WebKit|Moz|MS|O').match(new RegExp('(' + pre + ')', 'i'))[1];
  return {
	dom: dom,
	lowercase: pre,
	css: '-' + pre + '-',
	js: pre[0].toUpperCase() + pre.substr(1)
  };
})();