function getJSON(obj)
{
switch (typeof obj) {
case 'number':
return obj;

case 'string':
obj = obj.replace('"', '\\"');
obj = obj.replace('\r', '\\r');
obj = obj.replace('\n', '\\n');
return '"'+obj+'"';

case 'object':
var arr = [];
if (obj instanceof Array) {
for (var i=0;i<obj.length;i++) {
arr.push( getJSON(obj[i]) );
}
return '['+arr.join(',')+']';
}
else {
for (prop in obj) {
arr.push( '"'+prop+'":'+getJSON(obj[prop]) );
}
return '{'+arr.join(',')+'}';
}
}
return "";
}