输入校验

//校验特殊字符
    function _checkCharacter(string){
        var flag = "";
        var regLegal = /^[a-zA-Z0-9\.,の:%!［］【】~\u4e00-\u9fa5]*$/,       //必须包含这些字符
            regRepeat = /([\.,の:%!［］【】~])\1\1\1/;       //相同字符不能连续出现3次以上
        if(!regLegal.test(string)){
            flag = "输入字符不合法";
        } else if(regRepeat.test(string)){
            flag = "特殊字符不得连续超过3个";
        } else if (string.length > 12){
            flag = "输入字符长度超过限制";
        }
        return flag;
    }