//document.attachEvent('onkeypress',selectGCByKey);
//document.attachEvent("onkeyup",lightGCByKey);
if (window.attachEvent) {
    window.attachEvent('onkeypress',selectGCByKey);
    window.attachEvent("onkeyup",lightGCByKey);
}
else {
    window.addEventListener('onkeypress',selectGCByKey);
    window.addEventListener('onkeyup',lightGCByKey);
}

------解决方案--------------------

把js中的一个函数改成如下试试。
JScript code

function fChooseCity(objSel)
    {
        vObjTag.value = objSel.innerText;
        hcf.style.display = "none";
        vObjTag.focus();
    }