javascript 事件绑定问题

<input type="checkbox" name="check" onclick="CheckedBox(this)" value="a" />

function CreateIOC(text,value) { 
var o = document.createElement("a"); 
o.id = value; 
o.href = "#"; 
o.className = "c"; 
o.style.border = "2px solid red"; 
o.style.width = "250px"; 
o.style.height = "30px"; 
o.style.display = "block"; 
o.innerHTML = "<table><tr><td>" + text + "</td><td><img src='/JavaScripts/Data/close.gif' width='13' height='13'/></td></tr></table>"; 
o.setAttribute("onclick", "iocClick()"); 
return o; 
} 
function iocClick() { 
alert('ok'); 
} 
function CheckedBox(box) { 
window.parent.document.getElementById("kdks_panel").appendChild(CreateIOC('1','2')); 
}

<div id="kdks_panel"></div>