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      var objInstance = new ObjName(´«µÝ¸ø¸Ã¶ÔÏóµÄʵ¼Ê²ÎÊýÁбí);
eg:
      <script type="text/javascript">
<!--
//¹¹Ô캯Êý£¬¶¨ÒåÁËÒ»¸ö¹¹Ô캯Êý¼´¶¨ÒåÁËÒ»¸ö¶ÔÏó
function Person()
{
}
//´´½¨Ò»¸ö¶ÔÏóʵÀý
var person1 = new Person();
//Ϊ¶ÔÏóʵÀýÔö¼ÓеijÉÔ±²¢¸³Öµ£¬ÒÔºó¾Í¿ÉÒÔÓÃÕâЩ³ÉÔ±
//ÓöÔÏóʵÀýÃû.³ÉÔ±Ãû£¬Ò²¿ÉÒÔ¶ÔÏóʵÀý['³ÉÔ±±äÁ¿Ãû']
person1.age = 18;
person1.name = 'zxx';
alert(person1.name = ';' + person1.age);
function sayFunc()
{
alert(peson1.name + ':' + person1.age);
}
//Ϊ¶ÔÏóʵÀýÔö¼ÓÐµķ½·¨
person1.say = sayFunc;
person1.say();
// -->
</script>
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2£¬ËùÓеÄʵÀý¶ÔÏóÔÚ´´½¨ºó¶¼»á×Ô¶¯µ÷Óù¹Ô캯Êý£¬ÔÚ¹¹Ô캯ÊýÖÐÔö¼ÓµÄÊôÐԺͷ½·¨»á±»Ôö¼Óµ½Ã¿¸ö¶ÔÏóʵÀýÉÏ¡£
3£¬¶ÔÏóʵÀýÊÇÓÃnew¹Ø¼ü×Ö´´½¨µÄ£¬ÔÚ¹¹Ô캯ÊýÖв»ÒªÓзµ»Ø½á¹ûµÄreturnÓï¾ä¡£
4£¬µ÷ÓöÔÏóµÄ³ÉÔ±·½·¨Ê±£¬ÐèҪʹÓÓ¶ÔÏóʵÀý.³ÉÔ±·½·¨”µÄÐÎʽ£¬ºÜÏÔÈ»£¬ÓÃ×÷³ÉÔ±·½·¨µÄº¯Êý±»µ÷ÓõÄʱºò£¬Ò»¶¨°éËæÓÐij¸ö¶ÔÏóʵÀý¡£this¹Ø¼ü×Ö´ú±íij¸ö³ÉÔ±·½·¨Ö´ÐÐʱ£¬ÒýÓø÷½·¨µÄµ±Ç°¶ÔÏóʵÀý£¬ËùÒÔ£¬this¹Ø¼ü×ÖÖ»ÔÚÓÃ×÷¶ÔÏó³ÉÔ±·½·¨µÄº¯ÊýÖгöÏÖ¡£
eg:
 <script type="text/javascript">
<!--
function Person(name, age)
{
this.age = age;
this.name = name;
this.say = sayFunc();
}
function sayFunc()
{
alert(this.name + ',' + this.age);
}
var person1 = new Person('ÕÅÈý'£¬18);
person1.say();
var person2 = new Person('ÀîËÄ'£¬20);
person2.say();
// -->
</script>
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<!--
var msg = 'È«¾Ö±äÁ¿';
function show()
{
msg = '¾Ö²¿±äÁ¿'; //ÐÞ¸ÄÈ«¾Ö±äÁ¿µÄÖµ
}
show();
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