about javascript class name assigning dynamically

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Javascript

hi frens i want a small help

this is my code for adding textbox dynamically using javascript

function addRow(tableID) {

           var table = document.getElementById(tableID);

           var rowCount = table.rows.length;
           var row = table.insertRow(rowCount);

           var colCount = table.rows[0].cells.length;

           for(var i=0; i<colCount; i++) {

               var newcell = row.insertCell(i);

               newcell.innerHTML = table.rows[0].cells[i].innerHTML;
               //alert(newcell.childNodes);
               switch(newcell.childNodes[0].type) {
                   case "text":
                           newcell.childNodes[0].value = "";
                         /////  newcell.childNodes[0].name.class="txt";

                           break;

the commented line is added by me

i want to have the newly formed textbox class name as txt because i have to use its value for addition in another method call. i am not able to do it


please suggest with some solutions

with regards bishnu