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1¡¢call£ºÔÚ×ÓÀàÖУ¬Óø¸Àà.call£¨this£¬arg0£¬arg1...£©¿ÉÒԼ̳и¸Àà¡£×¢ÒâcallµÄλÖ㬾¡Á¿ÔÚ×ÓÀàµÄµÚÒ»ÐУ¨js°´Ë³ÐòÖ´ÐУ¬·ÅÔÚºóÃæ¿ÉÄܶÔ×ÓÀàµÄÆäËûÊôÐÔ¡¢·½·¨ÓÐÓ°Ïì¡£±ÈÈç×ÓÀàºÍ¸¸ÀàÓÐÏàͬÃû×ֵķ½·¨£¬ºóÃæµÄ¸²¸ÇÇ°ÃæµÄ£©¡£
<html>
<head>
<title>call\apply\prototype test</title>
</head>
<script type="text/javascript">
//personÀà
function person(name, age) {
this.name = name;
this.age = age;
this.say = function() {
document.write("I am a person");
}
this.display = function() {
document.write(this.name + "-" + this.age);
}
}
//studentÀ࣬¼Ì³Ð×Ôperson
function student(name, age, no) {
person.call(this, name, age);//personÖеÄthisµÈÓÚ²ÎÊýÖеÄthis£¬¼´studentÖеÄnameºÍage
this.no = no;
this.display = function() {//¸²¸ÇÁ˸¸ÀàµÄ·½·¨
document.write(this.name + "-" + this.age + "-" + this.no);
}
}
//´´½¨personÀà
var p = new person("captain", 21);
p.display();//captain-21
p.say();//I am a person
//´´½¨studentÀà
var s = new student("captain", 21, "06281097")
s.display();//captain-21-06281097
s.say();//I am a person ¼Ì³ÐÁ˸¸ÀàµÄ·½·¨
<script>
<body>
</body>
</html>
2¡¢apply£ºÔÚ×ÓÀàÖУ¬Óø¸Àà.apply£¨this£¬args£©¿ÉÒԼ̳и¸ÀࣨargsΪ²ÎÊýÊý×飩¡£
<html>
<head>
<title>call\apply\prototype test</title>
</head>
<script type="text/javascript">
//personÀà
function person(name, age) {
this.name = name;
this.age = age;
this.say = function() {
document.write("I am a person");
}
this.display = function() {
document.write(this.name + "-" + this.age);
}
}
//studentÀ࣬¼Ì³Ð×Ôperson
function student(name, age, no) {
person.apply(this, new Array(name, age));//Óëcall²»Í¬µÄÊÇ£¬apply´«µÝµÄÊÇÊý×é
this.no = no;
this.display = function() {//¸²¸ÇÁ˸¸ÀàµÄ·½·¨
document.write(this.name + "-" + this.age + "-" + this.no);
}
}
//´´½¨pe


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