<html>
<head>
<title>javascript The use of ordinary functions in </title>
<script>
function show(){
document.write("show The function is called " + "<br/>");
return 10;
}
var hello = show();//The show() function is called, assigning the return value to the hello variable. If the function does not return a value, it returns undefined
document.write(hello + "<br/>");//10
var hello2 = show;//Show and hello2 point to the same function
document.write(hello2 + "<br/>");//Print out the body of the show function
hello2();//This is equivalent to calling the show () function
</script>
</head>
<body>
</body>
</html>