js/dao.js

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var sina = {
    $: function (objName) {
        if (document.getElementById) {
            return eval('document.getElementById("' + objName + '")')
        } else {
            return eval('document.all.' + objName)
        }
    },
    isIE: navigator.appVersion.indexOf("MSIE") != -1 ? true : false,
    addEvent: function (l, i, I) {
        if (l.attachEvent) {
            l.attachEvent("on" + i, I)
        } else {
            l.addEventListener(i, I, false)
        }
    },
    delEvent: function (l, i, I) {
        if (l.detachEvent) {
            l.detachEvent("on" + i, I)
        } else {
            l.removeEventListener(i, I, false)
        }
    },
    readCookie: function (O) {
        var o = "",
        l = O + "=";
        if (document.cookie.length > 0) {
            var i = document.cookie.indexOf(l);
            if (i != -1) {
                i += l.length;
                var I = document.cookie.indexOf(";", i);
                if (I == -1) I = document.cookie.length;
                o = unescape(document.cookie.substring(i, I))
            }
        };
        return o
    },
    writeCookie: function (i, l, o, c) {
        var O = "",
        I = "";
        if (o != null) {
            O = new Date((new Date).getTime() + o * 3600000);
            O = "; expires=" + O.toGMTString()
        };
        if (c != null) {
            I = ";domain=" + c
        };
        document.cookie = i + "=" + escape(l) + O + I
    },
    readStyle: function (I, l) {
        if (I.style[l]) {
            return I.style[l]
        } else if (I.currentStyle) {
            return I.currentStyle[l]
        } else if (document.defaultView && document.defaultView.getComputedStyle) {
            var i = document.defaultView.getComputedStyle(I, null);
            return i.getPropertyValue(l)
        } else {
            return null
        }