Creacion de input radio, con createElement

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function item_creator_1(id,parent){
mitd = document.createElement("<INPUT TYPE='RADIO' NAME='RADIOTEST' VALUE='First Choice'>");
mitd.id =id;
mitd.value="all";
mitd.checked="true";
x = document.getElementById(parent);
tableCells = x.getElementsByTagName("td");
docBody = x ;
docBody.appendChild(mitd);
}