Thanks Teo, Your solution works perfectly. regards Viktor
On Sep 2, 8:07 pm, Teo <[email protected]> wrote: > Hi, > > this sometimes happens in other programming languages too. What you > can do is try something like: t=this; or var t=this; > The second solution would make a local reference to 'this' (the first > t would be global). So in the onChange function you could try > t.testVar. > From what i remember about Javascript t should only be a reference to > the actual object, so it will be an up-to-date object. > > Hope this helps, > Teo > > On Sep 2, 6:29 pm, Daidalos <[email protected]> wrote: > > > Hi all, > > > I have a bit of a problem with the onreadystatechange function of the > > XMLHttpRequest. > > > I have an object with methods to download an image and to do something > > with it after the download is finished. > > The downloading is working fine, but when the onreadystatechange > > function is called the variable "this" does not point to the object. > > As if the method was somehow called "outside" the object. > > > To clearify see the following code (it is just a sample to demostrate > > the problem): > > > > function createObject(){ > > > this.testVar = "test text"; > > > this.testDownload = function (){ > > > this.req = new XMLHttpRequest(); > > > this.req.open("GET", "http://www.google.com/webhp";, true); > > > this.req.onreadystatechange = this.onChange; > > > this.req.send(); > > > }; > > > this.onChange = function (){ > > > alert(testObject.testVar); > > > alert(this.testVar); > > > alert(typeof(this)); > > > alert(typeof(this.testVar)); > > > } > > > } > > > function view_onOpen() { > > > testObject = new createObject(); > > > testObject.testDownload(); > > > } > > > When the function view_onOpen() is executed the first alert contains > > the expacted "test text" but the second alert is just blank. typeof > > (this) retruns "object" but typeof(this.testVar) returns "undefined". > > > What can I do to make it work, does anybody have an idea? > > > thanks and best regards > > -Viktor --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Desktop Developer Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-desktop-developer?hl=en -~----------~----~----~----~------~----~------~--~---
