<!DOCTYPE html>
<html>
<head>
<title>javascript函数的传递</title>
<script type="text/javascript">
function callFun(fun,arg){
//第一个参数是函数的对象
return fun(arg);
}
function sum(num){
return num+100;
}
function say(str){
alert("hello"+str);
}
//调用了say函数
callFun(say,"JACK");
//调用了sum函数
alert(callFun(sum,20));
function fn1(arg){
var rel = function(num){
return arg+num;
}
return rel;
}
var f = fn1(120);
alert(f(20));
</script>
</head>
<body>
</body>
</html>
原文：http://www.cnblogs.com/aicpcode/p/4278697.html