JSON与JS对象的区别与对比

<script>
var obj2={};//这只是JS对象
var obj3={width:100,height:200};/这跟JSON就更不沾边了,只是JS的 对象 /
var obj4={'width':100,'height':200};/这跟JSON就更不沾边了,只是JS的对象 /
var obj5={"width":100,"height":200,"name":"rose"}; /我们可以把这个称做JSON格式的JavaScript对象 /
var str1='{"width":100,"height":200,"name":"rose"}';/我们可以把这个称做JSON格式的字符串 /
var a=[
 {"width":100,"height":200,"name":"rose"},
 {"width":100,"height":200,"name":"rose"},
 {"width":100,"height":200,"name":"rose"},
 ];
 /这个叫JSON格式的数组，是JSON的稍复杂一点的形式 /
var str2='['+
 '{"width":100,"height":200,"name":"rose"},'+
 '{"width":100,"height":200,"name":"rose"},'+
 '{"width":100,"height":200,"name":"rose"},'+
 ']' ;
 / 这个叫稍复杂一点的JSON格式的字符串 / 
</script>