diff --git a/bin/cert.sh b/bin/cert.sh
index b19eec5..13ecb93 100755
--- a/bin/cert.sh
+++ b/bin/cert.sh
@@ -2,19 +2,64 @@
 DOMAIN=''
 TYPE=0
 CONT_NAME='litespeed'
+NOMAIL='off'
+EMAIL=''
+DOC_ROOT=''
 
 help_message(){
-    echo 'Command [your_domain]'
-    echo 'Script will get database password and wordpress password from .env file and install the demo wordpress site for you'
+    case ${1} in
+        "1")
+        echo 'Command 1. [-domain DOMAIN_NAME] [-mail YOUR_MAIL]'
+        echo 'Command 2. [-domain DOMAIN_NAME] [--no-mail]'
+        echo 'Coomand 3. [-domain DOMAIN_NAME] [-mail YOUR_MAIL] [-doc DOCUMENT_ROOT_PATH]'
+        echo 'Script will apply the Lets encrypt certificate for you'
+        echo 'If you apply with --nomail, the script will then use --register-unsafely-without-email for you'
+        echo 'Script will use /var/www/vhosts/DOMAIN_NAME/html as default document root unless you specify the doc path'
+        ;;
+        "2")
+        echo 'Service finished, enjoy your accelarated LiteSpeed server!'
+        ;;
+    esac    
+}
+
+echoG() {
+    echo -e "\033[38;5;71m${1}\033[39m"
 }
 
 check_input(){
     if [ -z "${1}" ]; then
-        help_message
+        help_message 1
         exit 1
     fi
 }
 
+domain_filter(){
+    DOMAIN="${1}"
+    DOMAIN="${DOMAIN#http://}"
+    DOMAIN="${DOMAIN#https://}"
+    DOMAIN="${DOMAIN#ftp://}"
+    DOMAIN="${DOMAIN#scp://}"
+    DOMAIN="${DOMAIN#scp://}"
+    DOMAIN="${DOMAIN#sftp://}"
+    DOMAIN=${DOMAIN%%/*}
+}
+
+email_filter(){
+    if [ "${NOMAIL}" = 'off' ]; then
+        if [ "${EMAIL}" = '' ]; then
+            help_message 1
+            exit 1
+        fi
+        CKREG="^[a-z0-9!#\$%&'*+/=?^_\`{|}~-]+(\.[a-z0-9!#$%&'*+/=?^_\`{|}~-]+)*@([a-z0-9]([a-z0-9-]*[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]*[a-z0-9])?\$"
+        if [[ ${1} =~ ${CKREG} ]] ; then
+            echo -e "[O] The E-mail you entered \033[32m${EMAIL}\033[0m is valid."
+        else
+            echo -e "[X] The E-mail you entered \e[31m${EMAIL}\e[39m is invalid"
+            exit 1
+        fi
+    fi    
+}
+
 www_domain(){
     CHECK_WWW=$(echo ${1} | cut -c1-4)
     if [[ ${CHECK_WWW} == www. ]] ; then
@@ -28,54 +73,111 @@ www_domain(){
 domain_verify(){
     curl -Is http://${DOMAIN}/ | grep -i LiteSpeed > /dev/null 2>&1
     if [ ${?} = 0 ]; then
-        echo "[OK] ${DOMAIN} is accessible."
+        echo -e "[O] The domain you entered \033[32m${DOMAIN}\033[0m is accessible."
         TYPE=1
         curl -Is http://${WWW_DOMAIN}/ | grep -i LiteSpeed > /dev/null 2>&1
         if [ ${?} = 0 ]; then
-            echo "[OK] ${WWW_DOMAIN} is accessible."
+            echo -e "[O] The domain you entered \033[32m${WWW_DOMAIN}\033[0m is accessible."
             TYPE=2
         else
-            echo "${WWW_DOMAIN} is inaccessible." 
+            echo -e "[!] The domain you entered ${WWW_DOMAIN} is inaccessible." 
         fi
     else
-        echo "${MY_DOMAIN} is inaccessible, please verify."; exit 1    
+        echo -e "[X] The domain you entered \e[31m${DOMAIN}\e[39m is inaccessible, please verify."
+        exit 1    
     fi
 }
 
-lecertapply(){
+doc_root_verify(){
+    if [ "${DOC_ROOT}" = '' ]; then
+        DOC_PATH="/var/www/vhosts/${1}/html"
+    else
+        DOC_PATH="${DOC_ROOT}"    
+    fi
+    docker-compose exec ${CONT_NAME} su -c "[ -e ${DOC_PATH} ]"
+    if [ ${?} -eq 0 ]; then
+        echo -e "[O] The document root folder \033[32m${DOC_PATH}\033[0m is exit."
+    else
+        echo -e "[X] The document root folder you entered \e[31m${DOC_PATH}\e[39m is not exist!"
+        exit 1
+    fi
+}
+
+lecert_apply(){
+    local TMP_MAIL
+    if [ "${EMAIL}" != '' ]; then
+        TMP_MAIL="-m ${EMAIL}"
+    elif [ "${NOMAIL}" = 'on' ]; then
+        TMP_MAIL='--register-unsafely-without-email'
+    else
+        echo 'unknown mail type!'
+        exit 2            
+    fi
     if [ ${TYPE} = 1 ]; then
-        docker-compose exec ${CONT_NAME} su -c "certbot certonly --agree-tos --register-unsafely-without-email \
-            --non-interactive --webroot -w /var/www/vhosts/${1}/html -d ${1}"
+        docker-compose exec ${CONT_NAME} su -c "certbot certonly --agree-tos ${TMP_MAIL} \
+            --non-interactive --webroot -w ${DOC_PATH} -d ${1}"
     elif [ ${TYPE} = 2 ]; then
-        docker-compose exec ${CONT_NAME} su -c "certbot certonly --agree-tos --register-unsafely-without-email \
-            --non-interactive --webroot -w /var/www/vhosts/${1}/html -d ${1} -d www.${1}"
+        docker-compose exec ${CONT_NAME} su -c "certbot certonly --agree-tos ${TMP_MAIL} \
+            --non-interactive --webroot -w ${DOC_PATH} -d ${1} -d www.${1}"
     else
         echo 'unknown Type!'
         exit 2
-    fi          
+    fi
+    if [ ${?} -eq 0 ]; then
+        echoG 'Certificate has been successfully installed'
+    else
+        echo 'Oops, something went wrong...'
+        exit 1
+    fi    
 }    
 
-certbothook(){
+certbot_hook(){
+    echo 'Add certbot hook if not exist.'
     docker-compose exec ${CONT_NAME} su -s /bin/bash -c "certhookctl.sh"
-}    
+}
+
+lsws_restart(){
+    docker-compose exec ${CONT_NAME} su -c '/usr/local/lsws/bin/lswsctrl restart >/dev/null'
+}
 
 main(){
-    www_domain ${1}
+    domain_filter ${DOMAIN}
+    www_domain ${DOMAIN}
     domain_verify
-    lecertapply ${DOMAIN}
-    certbothook
-    bash bin/webadmin.sh -r
+    email_filter ${EMAIL}
+    doc_root_verify ${DOMAIN}
+    lecert_apply ${DOMAIN} ${EMAIL}
+    certbot_hook
+    lsws_restart
+    help_message 2
 }    
 
 check_input ${1}
 while [ ! -z "${1}" ]; do
     case ${1} in
         -[hH] | -help | --help)
-            help_message
+            help_message 1
+            ;;
+        -[dD] | -domain | --domain) shift
+            check_input ${1}
+            DOMAIN="${1}"
+            ;;
+        -[mM] | -mail | --mail) shift
+            check_input ${1}
+            EMAIL="${1}"
+            ;;
+        -no-mail | -nomail | --no-mail)
+            NOMAIL='on'
+            ;;
+        -doc | -DOC | --doc) shift
+            check_input ${1}
+            DOC_ROOT="${1}"
             ;;
         *) 
-            main ${1}
-            ;;              
+            help_message 1
+            exit 1
+            ;;
     esac
     shift
-done
\ No newline at end of file
+done
+main
\ No newline at end of file