jQuery: $(element).text() doesn't work

Why isn't this working? I've searched Stackoverflow and jQuery API and it should work. Instead I get an empty string :(

function a(){
     var div=document.createElement("div");
     div.innerHTML='<a class="aClass" href="javascript:showMyText(this)">Link Text</a>';
 
     var parent_div=document.getElementById('dinamicni_div');
     parent_div.appendChild(div);    
 }
 
 function showMyText(link){
     var txt=$(link).text();
     alert(txt);
 }
 

---