chrome新版本中的showmodalDialog问题

谷歌chrome在新版本中删除了showmodalDialog。我用这个浏览器的代码不起作用，我该如何解决我的问题？

function AddTime(OfferTime) {
    var x = new Array();
    var ClsPartColeg = document.getElementById("ClassParam").value;
    x[0] = SrcName(ClsPartColeg, 'PartCombo');
    if (OfferTime)
        x[1] = OfferTime;
    else
        x[1] = '$$0$' + SrcName(ClsPartColeg, 'College') + '$';
    var s = showModalDialog("../HtmlPage/ClsTime.htm", x, "status:0;help:0;dialogWidth:420px;dialogHeight:100px");
    if (s)
        Perform('NewTime;Item=' + s);
}