function getQueryString(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
    var r = window.location.search.substr(1).match(reg);
    if (r != null)
        return unescape(r[2]);
    return null;
}

function setCookie(name, value) {
    var Days = 1; //此 cookie 将被保存 1 天
    var exp = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}

function getCookie(name) {
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null) return unescape(arr[2]); return null;
}

function delCookie(name) {
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = getCookie(name);
    if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
}
function testCookie(){
    var cookieName = "test";
    var cookieValue = "ok";
    setCookie(cookieName,cookieValue);
    if(getCookie(cookieName)==cookieValue){
        delCookie(cookieName);
        return true;
    }else{
        return false;
    }
}
function subString(str, len, hasDot) {
    var newLength = 0;
    var newStr = "";
    var chineseRegex = /[^\x00-\xff]/g;
    var singleChar = "";
    var strLength = str.replace(chineseRegex, "**").length;
    for (var i = 0; i < strLength; i++) {
        singleChar = str.charAt(i).toString();
        if (singleChar.match(chineseRegex) != null) {
            newLength += 2;
        }
        else {
            newLength++;
        }
        if (newLength > len) {
            break;
        }
        newStr += singleChar;
    }

    if (hasDot && strLength > len) {
        newStr += "...";
    }
    return newStr;
}
function strLength(str){
    var chineseRegex = /[^\x00-\xff]/g;
    return str.replace(chineseRegex, "**").length;
}
function stringBuffer(){
    this.strings=[];
    this.append=function(str){
        this.strings.push(str);
    }
    this.toString=function(){
        return this.strings.join("");
    }
}