Read an Excel File with JavaScript (without ActiveXObject)

1. < script type = "text/javascript" > function Upload() {  
2.     var fileUpload = document.getElementById("fileUpload");  
3.     var regex = /^([a-zA-Z0-9\s_\\.\-:])+(.csv|.txt)$/;  
4.     if (regex.test(fileUpload.value.toLowerCase())) {  
5.         if (typeof(FileReader) != "undefined") {  
6.             var reader = new FileReader();  
7.             reader.onload = function(e) {  
8.                 var table = document.createElement("table");  
9.                 var rows = e.target.result.split("\n");  
10.                 for (var i = 0; i < rows.length; i++) {  
11.                     var row = table.insertRow(-1);  
12.                     var cells = rows[i].split(",");  
13.                     for (var j = 0; j < cells.length; j++) {  
14.                         var cell = row.insertCell(-1);  
15.                         cell.innerHTML = cells[j];  
16.                     }  
17.                 }  
18.                 var dvCSV = document.getElementById("dvCSV");  
19.                 dvCSV.innerHTML = "";  
20.                 dvCSV.appendChild(table);  
21.             }  
22.             reader.readAsText(fileUpload.files[0]);  
23.         } else {  
24.             alert("This browser does not support HTML5.");  
25.         }  
26.     } else {  
27.         alert("Please upload a valid CSV file.");  
28.     }  
29. } < /script>