1 function toArray(coll) { 2 for (var i = 0, a = [], len = coll.length; i < len; i++) { 3 a[i] = coll[i]; 4 } 5 return a; 6 } 7 8 //用法 9 var coll = document.getElementsByTagName('div'); 10 var arr = toArray(coll);