js automatically generates the attribute example code of object

function autoCreateObjProperty(temString){
var TemObjs = (".");
for(var i =0;i<;i++){
var ttt = TemObjs[i];
if(!(TemObjs[i])){
var objString="obj";
for(var j= 1;j<=i;j++){
objString+="."+TemObjs[j];
}

obj = eval(objString);
if(obj == undefined){
var temObjString="obj"; //The name of the object var obj = {}
for(var j= 1;j<i;j++){
temObjString+="."+TemObjs[j];
}
obj = eval(temObjString);
obj[TemObjs[i]]={};
obj={};
}
}else{
obj = obj[TemObjs[i]];
}
}
return obj;

}