<script>
function Person(name){
this.name=name;
};
Person.prototype.company="Microsoft";
Person.prototype.SayHello=function(){
alert("hello,I'm "+ this.name+ " of "+ this.company)
};
var BillGates=new Person("Bill Gates");
BillGates.SayHello();
var SteveJobs=new Person("Steve Jobs");
SteveJobs.company="apple";
SteveJobs.SayHello();
BillGates.SayHello();
</script>
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