// JavaScript Document

 function addRow(id){
    var tbody = document.getElementById(id).getElementsByTagName("TBODY")[0];
    var row = document.createElement("tr")
	var td1 = document.createElement("td")
	//td1.appendChild(document.createTextNode("column 1"))
	td1.innerHTML="<input class='arial_content' name='file_name[]' type='file' style='margin-top:5px;'>";
    row.appendChild(td1);
    tbody.appendChild(row);
  }