function test(options) {
if (options == undefined) options = {};
if (options.name == undefined) options.name = "기본 도형";
if (options.width == undefined) options.width = 10;
if (options.height == undefined) options.height = 10;
}
test({
name : "도형1",
width : 10,
height : 20
});
test({
name : "도형2"
});