$.extend(true,default,opts||{});
var obj1={
name:'liu',
sex:'m',
work:'pc'
}
var obj2={
sex:'w'
} var obj={}
for(var attr in obj1){
obj[attr]=obj1[attr];
}
for(var attr in obj2){
obj[attr]=obj2[attr];
}
console.log(obj)
//{name:'liu',sex:'w',work:'pc'}