javaScript JSON 遍历(for in)

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script>/*var obj={a: 5, b: 6, c:'abc', d: [1,2,3,4]};alert(obj.d[0]);*/var arr=[{a: 5, b: 12}, {a: 6, b: 19}];alert(arr[1].b);</script></head><body></body></html>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script>var obj={a: 5, b: 3, c: 98};var attr='';for(attr in obj){    alert(attr+'='+obj[attr]);}</script></head><body></body></html>

参考：JavaScript

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