function formatName(name) {
var Str;
if (name.length === 2) {
Str = name.substr(0, 1) + '';
} else if (name.length > 2) {
var char = '';
for (var i = 0, len = name.length - 2; i < len; i++) {
char += '';
}
Str = name.substr(0, 1) + char + name.substr(-1, 1);
} else {
Str = name;
}
return Str;
}
console.log(formatName('hh')); //h*
console.log(formatName('看看看')); //看看
console.log(formatName('看看看看看')); //看**看
