почти свойство

js/script.js

function objOne(arg0, arg1) {
this.getVal = function() {
return arg0;
}
this.getStr = function() {
return arg1;
}
this.fun = function fun() {
for(var i=0; i<this.getVal(); i++) {
document.write(this.getStr() + '<br />');
}
}
}
function funMake() {
var O = new objOne(5, 'Hello World!');
O.fun();
}

function objOne(arg0, arg1) {
this.getVal = function() {
return arg0;
}
this.getStr = function() {
return arg1;
}
this.fun = function fun() {
for(var i=0; i<this.getVal(); i++) {
document.write(this.getStr() + '<br />');
}
}
}
function funMake() {
var O = new objOne(5, 'Hello World!');
O.fun();
}

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<script>
funMake();
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<script>
funMake();
</script>
</body>
</html>