//生成大写字母 A的Unicode值为65function generateBig_1(){  var str = [];  for(var i=65;i<91;i++){    str.push(String.fromCharCode(i));  }  return str;}//生成大写字母 a的Unicode值为97function generateSmall_1(){  var str = [];  for(var i=97;i<123;i++){    str.push(String.fromCharCode(i));  }  return str;}//将字符串转换成Unicode码function toUnicode(str){  var codes = [];  for(var i=0;i<str.length;i++){    codes.push(str.charCodeAt(i));  }  return codes;}function generateSmall(){  var ch_small = 'a';  var str_small = '';  for(var i=0;i<26;i++){    str_small += String.fromCharCode(ch_small.charCodeAt(0)+i);  }  return str_small;}function generateBig(){  var ch_big = 'A';  var str_big = '';  for(var i=0;i<26;i++){    str_big += String.fromCharCode(ch_big.charCodeAt(0)+i);  }  return str_big;}console.log(generateBig());console.log(generateSmall());console.log(toUnicode(generateBig()));console.log(toUnicode(generateSmall()));console.log(generateBig_1());console.log(generateSmall_1());