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add object events


aspnetguy
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So I want to assign a onchage event to my object, i tried this

var SelectBox = new DropDownList(document.getElementById('selectList'));function DropDownList(obj){    this.Items = obj.options;    ...    this.onchange = function(){}}

but it thinks I am trying to create a onchange method for the object.so I tried this

var SelectBox = new DropDownList(document.getElementById('selectList'));function DropDownList(obj){    this.Items = obj.options;    ...    obj.onchange = function(){this.SelectedIndex = obj.selectedIndex}}

But in this context (inside the onchange function) this is refering to the obj because I am defining the onchange for obj and obj (select tag) does not have SelectedIndexIs there a way to attach an onchange event (or an event for that matter) to the object (this.onchange)

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