js 回调函数

<div id="apDiv1">
<button οnclick="f1()">回调</button>
</div>

<script>
function f1(){
getInput("Javascript" , 
function(generalLastName,str){
console.log(generalLastName + ":" + str)  
});
}
function getInput(options, callback){
var str = options;
callback('message',str);
}
</script>