I am a new kid with dojo, I got weird issue which I take lots of time and have not yet found out, assume I have 4 buttons:

<button id="btnMoveFirst" data-dojo-type="dijit.form.Button" iconclass="plusIcon">
    &lt; &lt;</button>
<button id="btnMovePrev" data-dojo-type="dijit.form.Button" iconclass="plusIcon">
    &lt;</button>
<button id="btnMoveNext" data-dojo-type="dijit.form.Button" iconclass="plusIcon">
    &gt;</button>
<button id="btnMoveLast" data-dojo-type="dijit.form.Button" iconclass="plusIcon">
    &gt; &gt;</button>

And use dojo with event onclick as below:

dojo.connect(dijit.registry.byId('btnMoveFirst'), "onclick",  function(evt){
    alert('test1');
});

dojo.connect(dijit.registry.byId('btnMovePrev'), "onclick",  function(evt){
     alert('test2');
});

dojo.connect(dijit.registry.byId('btnMoveNext'), "onclick",  function(evt){
     alert('test3');
});

dojo.connect(dijit.registry.byId('btnMoveLast'), "onclick",  function(evt){
     alert('test4');
});

But when I click any one of 4 buttons, or even any button in form, I got 4 alerts instead of only correct one.

Does anyone know this?