js 常用代码

 //获取url中的参数     

  function getUrlParam(name) {
            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
            var r = window.location.search.substr(1).match(reg);  //匹配目标参数
            if (r != null) return unescape(r[2]); return null; //返回参数值
        }

 
function GetUrlParas(paras) {
    var url = location.href;
    var paraString = url.substring(url.indexOf("?") + 1, url.length).split("&");
    var paraObj = {};
    for (var i = 0; j = paraString[i]; i++) {
        paraObj[j.substring(0, j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=") + 1, j.length);
    }
    var returnValue = paraObj[paras.toLowerCase()];
    if (typeof (returnValue) == "undefined") {
        return "";
    } else {
        return returnValue;
    }
}

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

//检查特殊字符

function CheckKeyCharacters(strString) {
            var flag = true;
            if (strString.length > 0) {
                if (strString.indexOf('<') > -1) {
                    alert("检索文字中包含”<“");
                    flag = false;
                } else if (strString.indexOf('&') > -1) {
                    alert("检索文字中包含”&“");
                    flag = false;
                }
            }
            return flag;
        }

//获取浏览器名字
      

 function getBrowserInfo() {
            var userAgent = navigator.userAgent,
            rMsie = /(msies|trident.*rv:)([w.]+)/;
            rChrome = /(chrome)/([w.]+)/;
            var regStr_ff = /(firefox)/[d.]+/gi

            var ua = userAgent.toLowerCase();

            var win = "";//操作系统位数
            if (ua.indexOf("win64") >= 0 || ua.indexOf("wow64") >= 0) {
                win = "x64";
            } else if (ua.indexOf("win32") >= 0 || ua.indexOf("wow32") >= 0) {
                win = "x32";
            }
            var win_vision = "other";
            if (ua.indexOf("Windows NT 5.0") > -1 || ua.indexOf("Windows 2000") > -1) {
                win_vision = "windows2000";
            } else if (ua.indexOf("Windows NT 5.1") > -1 || ua.indexOf("Windows XP") > -1) {
                win_vision = "xp";
            } else if (ua.indexOf("Windows NT 5.2") > -1 || ua.indexOf("Windows 2003") > -1) {
                win_vision = "windows2003";
            } else if (ua.indexOf("Windows NT 6.0") > -1 || ua.indexOf("Windows Vista") > -1) {
                win_vision = "vista";
            } else if (ua.indexOf("Windows NT 6.1") > -1 || ua.indexOf("Windows 7") > -1) {
                win_vision = "win7";
            }

            //alert(ua);
            if (rMsie.exec(ua) != null) {
                var match = rMsie.exec(ua);
                if ((ua.indexOf('aoyou') > -1)
                  || (ua.indexOf('theworld') > -1) || (ua.indexOf('worldchrome') > -1) || (ua.indexOf('greenbrowser') > -1)
                  || (ua.indexOf('baidu') > -1) || (ua.indexOf('qqbrowser') > -1) || ua.indexOf('maxthon') > -1 || ua.indexOf('chihiro') > -1
                  || ua.indexOf('7star') > -1 || ua.indexOf('airview') > -1) {
                    return { browser: "", version: "0" };
                } else if ((ua.indexOf('360ee') > -1) || (ua.indexOf('360se') > -1) || (ua.indexOf('se') > -1)) {
                    return { browser: "360", version: "0", sys: win }
                }
                else {
                    return { browser: "IE", version: match[2] || "0", sys: win, win_vision: win_vision };
                }
            }
            else if (rChrome.exec(ua) != null) {
                var isChrome = window.clientInformation && window.clientInformation.permissions;
                if (isChrome) {
                    var match = rChrome.exec(ua);
                    return { browser: match[1] || "", version: match[2] || "0", sys: win, win_vision: win_vision };
                } else if (ua.indexOf("maxthon") > -1) {
                    return { browser: "aoyou", version: "0", sys: win, win_vision: win_vision };
                }
                else if (ua.indexOf("edge") > -1) {
                    return { browser: "edge", version: "0", sys: win, win_vision: win_vision };
                }
                else {
                    return { browser: "", version: "0", sys: win, win_vision: win_vision };
                }
            } else if (ua.indexOf("firefox") > 0) {
                var match = regStr_ff.exec(ua);
                return { browser: match[1], version: "0", sys: win, win_vision: win_vision };
            }
            else {
                return { browser: "", version: "0", sys: win, win_vision: win_vision };
            }

        }

检查字符串 包含

if (url.indexOf("http://") === -1) {
}
else{
}