diff --git a/dabo/functions/genchart.sh b/dabo/functions/genchart.sh
new file mode 100644
index 0000000..3df1687
--- /dev/null
+++ b/dabo/functions/genchart.sh
@@ -0,0 +1,105 @@
+function genchart {
+  # generate css chart (line diagram) from csv file or simple file with number per line - needed charts.css included in webppage
+  local mark
+  local lastmark
+  local file=$1
+  local lastlines=$2
+  [ -z "${lastlines}" ] && lastlines=50
+  local fields=$3
+  [ -z "${fields}" ] && fields=1
+  local colors=$4
+  [ -z "${colors}" ] && colors="White,Gold,Silver,Blue,DarkMagenta,DarkViolet,Indigo,MediumBlue,DarkOrchid,MidnightBlue,CornflowerBlue,CadetBlue,DarkCyan,DarkSlateBlue,DeepSkyBlue,DodgerBlue,Teal"
+
+  local awkfields=$(echo "${fields}" | sed 's/,/ \",\" \$/g; s/^/\$/')
+  #tail -n ${lastlines} "${file}" | cut -d, -f${fields} | egrep "^[-0-9]" >${g_tmp}/g_genchart_data
+  tail -n ${lastlines} "${file}" | awk -F',' "{ print $awkfields }" | perl -pe 's/,,+//g' | egrep "^[-0-9]" >${g_tmp}/g_genchart_data
+  lines=$(cat ${g_tmp}/g_genchart_data | wc -l)
+  #head -n1 "${file}" | cut -d, -f${fields} >${g_tmp}/g_genchart_headline
+  head -n1 "${file}" | awk -F',' "{ print $awkfields }" >${g_tmp}/g_genchart_headline
+
+  local time_from=$(tail -n ${lastlines} "${file}" | head -n1 | cut -d, -f1)
+  local time_to=$(tail -n1 "${file}" | cut -d, -f1)
+
+  local highest=$(cat ${g_tmp}/g_genchart_data | sed 's/,/\n/g' | sort -n | egrep "^[-0-9]" | tail -n1 | sed 's/^-//')
+  local lowest=$(cat ${g_tmp}/g_genchart_data | sed 's/,/\n/g' | sort -n | egrep "^[-0-9]" | head -n1)
+  if echo ${lowest} | grep -q '^-'
+  then
+    lowest=$(echo ${lowest} | sed 's/^-//')
+    local calc="+ ${lowest}) / (${highest} + ${lowest}"
+    local calcnull="(0 $calc)"
+  else
+    local calc="- ${lowest}) / (${highest} - ${lowest}"
+    local calcnull="0"
+  fi
+  
+  #local divideby=$(echo "$highest+$lowest" | bc -l | sed 's/^\./0./; s/^-\./-0./')
+
+  local fieldsnum=$(cat ${g_tmp}/g_genchart_headline | sed 's/,/\n/g' | wc -l)
+
+  local color="green"
+  tail -n1 ${g_tmp}/g_genchart_data | cut -d, -f1 | grep -q "^-" && color="red"
+
+  mkdir ${g_tmp}/g_genchart
+  local RND=$RANDOM
+  echo "<table id='noborder' width='100%'><tr><td id='noborder' width='100%'>"
+  echo "<div id='$RND'>"
+  echo "<table class='charts-css line show-data-on-hover'><caption> $RND </caption>"
+  local line
+  for fieldnum in $(seq ${fieldsnum} | tac)
+  do
+    linecolor=$(echo "$colors" | cut -d, -f${fieldnum})
+    linename=$(cat ${g_tmp}/g_genchart_headline | cut -d, -f${fieldnum} | tr [:lower:] [:upper:])
+    if [ ${fieldnum} -eq 1 ] 
+    then
+      echo "<b><font color='${color}'>${linename}</font></b><br>"
+    else
+      echo "<b><font color='${linecolor}'>${linename}</font></b><br>"
+    fi >>${g_tmp}/g_genchart/legend
+    local linenum=1
+    for line in $(cat ${g_tmp}/g_genchart_data)
+    do
+      for mark in $(echo ${line} | cut -d, -f${fieldnum})
+      do
+        [ -z "${lastmark}" ] && lastmark=${mark}
+        local calcstart="(${lastmark} ${calc})"
+        local calcend="(${mark} ${calc})"
+        if [ ${fieldnum} -eq 1 ]
+        then
+          echo "<td style='--color: grey; --start: calc( ${calcnull} ); --end: calc( ${calcnull} );'> </td>"
+          echo "<td style='--color: ${color}; --start: calc( ${calcstart} ); --end: calc( ${calcend} );'> <span class='tooltip'> ${mark} </span> </td>"
+        else
+          echo "<td style='--color: ${linecolor}; --start: calc( ${calcstart} ); --end: calc( ${calcend} );'> </td>"
+        fi >>${g_tmp}/g_genchart/${linenum}
+        ((linenum=linenum+1))
+        lastmark=${mark}
+      done
+    done
+  done
+
+  # put all lines together
+  for linenum in $(seq 2 ${lines})
+  do
+    echo "<tr>"
+    cat ${g_tmp}/g_genchart/${linenum}
+    echo "</tr>"
+  done
+  echo "</table></div>"
+
+  # legend
+  if grep -q ',' ${g_tmp}/g_genchart_headline
+  then
+    echo "<td id='noborder'>"
+    tac ${g_tmp}/g_genchart/legend
+    echo "</td>"
+  fi
+
+  if echo ${time_from} | egrep -q '[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]' && echo ${time_to} | egrep -q '[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]'
+  then
+    echo "</tr><td id='noborder'><table width='100%' id='noborder'><tr><td id='noborder'><p style='text-align:left;'>${time_from}</p></td><td id='noborder' width='100%'><hr></td><td id='noborder'><p style='text-align:right;'>${time_to}</p></td></tr></table></td><td id='noborder'></td>"
+  fi
+
+  echo "</tr></table>"
+
+  rm -r ${g_tmp}/g_genchart
+  
+}