How to read data From *.CSV file using javascript?

My csv data looks like this:

heading1,heading2,heading3,heading4,heading5,value1_1,value2_1,value3_1,value4_1,value5_1,value1_2,value2_2,value3_2,value4_2,value5_2….

How do you read this data and convert to an array like this using Javascript?:

[heading1:value1_1 , heading2:value2_1, heading3 : value3_1, heading4
: value4_1, heading5 : value5_1 ],[heading1:value1_2 ,
heading2:value2_2, heading3 : value3_2, heading4 : value4_2, heading5
: value5_2 ]….

I’ve tried this code but no luck!:

<script type="text/javascript">
    var allText =[];
    var allTextLines = [];
    var Lines = [];

    var txtFile = new XMLHttpRequest();
    txtFile.open("GET", "file://d:/data.txt", true);
    txtFile.onreadystatechange = function()
    {
        allText = txtFile.responseText;
        allTextLines = allText.split(/\r\n|\n/);
    };

    document.write(allTextLines);<br>
    document.write(allText);<br>
    document.write(txtFile);<br>
</script>