代码如下:[removed] var key2code = {65:”a”,66:”b”,67:”c”,68:”d”,69:”e”,70:”f”,71:”g”,72:”h”,73:”i”,74:”j”, 75:”k”,76:”l”,77:”m”,78:”n”,79:”o”,80:”p”,81:”q”,82:”r”,83:”s”,84:”t”, 85:”u”,86:”v”,87:”w”,88:”x”,89:”y”,90:”z”,49:”1″,50:”2″,51:”3″,52:”4″, 53:”5″