模拟读取CSV数据文件，查找标题行和数据行

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
 </head>
 <body>
  <script>
    var lineData=new Array(
    "",
    "a1,22,33,44,55,66,77,88,99,00,11,22",
    "a2,22,33,44,55,66,77,88,99,00,11,22,33",
    "",
    "",
    "a3,22,33,44,55,66,77,88,99,00,11,22",
    "a4,22,33,44,55,66,77,88,99,00,11,22",
    "a5,22,33,44,55,66,77,88,99,00,11,22,33",
    "a6,22,33,44,55,66,77,88,99,00,11,22,33");
 
    function getHeadLine(lineData){
        var retHeadLine = 0;
        for (i = 0; i < lineData.length -1 ; i++)
        {
            if ( lineData[i] == "" )
            {
                continue;
            }
 
            var objLines = lineData[i].split(",");
            if ( objLines.length == 13 )
            {
                retHeadLine = i;
                break;
            }
        }
        alert(retHeadLine);
        return retHeadLine;
    }
 
    function getDataLine(lineData,iStart){
        var retHeadLine = 0;
        for (i = iStart; i < lineData.length -1 ; i++)
        {
            if ( lineData[i] == "" )
            {
                continue;
            }
 
            var objLines = lineData[i].split(",");
            if ( objLines.length == 13 )
            {
                retHeadLine = i;
                break;
            }
        }
        alert(retHeadLine);
        return retHeadLine;
    }
 
  </script>
  <form method="post" action="">
    <input type="button" value="getHeadLine" onclick="return getDataLine(lineData,0);">
    <input type="button" value="getDataLine" onclick="return getDataLine(lineData,(2+1));">
</form>
 </body>
</html>