Passing object to a function as an argument in javascript

I am trying to pass an object to a function but when I try to output the object it says "undefined". Here is an 开发者_运维问答example:

// object defined
this.object = new Ext.data.JsonStore({
  //some store properties
});

// printing object
function printObject (obj) {
   alert(obj); // my output is "undefined"
}

// trying to pass the object
printObject(this.object);

Can anyone tell me how can I pass an object as an argument? thanks in advance

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what is the context here, what does this refer to, another object? try calling it something other than 'object', perhaps 'data'. not 100% sure, but I think 'object' may be reserved.

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possibly it is the function pringObject (rather than printObject) that is undefined.

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Try this:

var obj = new Ext.data.JsonStore({
  //some store properties
});

So that obj is implicitly casted to an object of type returned by JsonStore