获取事件码，跨浏览器版

// 获取事件码        var getCharCode = function(event){            var charcode = event.charCode;            if(typeof charcode == "number" && charcode != 0){                return charcode;            }else{                //在中文输入法下 keyCode == 229 || keyCode == 197(Opera)                return event.keyCode;            }        };

// 输入校验        $("input[name='userAccount'], input[name='keyword'], input.search-text").keypress(function(e) {           e = e || window.event;           var code = getCharCode(e);           if(code >= 32 && code < 48 || code > 57 && code < 65 || code > 90 && code < 97) {               return false;           }        });