var json = '{"name":"GDT","age":,"University":"GDUT"}';
var info = JSON.parse(json); //解析为JSON对象
document.write(info.name + ' is a student of ' + info.University + ' and he is ' + info.age + " years old."); /info为Object对象
var info = {name:"GDT",age:,University:"GDUT"};
var json = JSON.stringify(info); //转换为JSON字符串
document.write(json); //output为{"name":"GDT","age":23,"University":"GDUT"}
eval("x=;y=;document.write(x*y)"); //output为
document.write(eval("+")); //output为
var x=;
document.write(eval(x+)); //output为
// JSON.parse()
var json = '{"name":"GDT","age":,"University":"GDUT"}';
var info = JSON.parse(json); //解析为JSON对象
document.write(info); //output为[object Object]
//eval()
var json = '{"name":"GDT","age":,"University":"GDUT"}';
var info = eval('(' + json + ')'); //解析为JSON对象
document.write(info); //output为[object Object]
alert(eval("{}")); // return undefined
alert(eval('('+'{}'+')')); // return object[Object]
var str = '{"a":"b"}';
document.write(eval("("+str+")")); //正常解析为对象
var str = '{"a": (function(){alert("I can do something bad!");})()}';
eval('('+str+')'); //可以用来执行木马脚本
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