jquery - Unable to get property '0' of undefined or null reference JavaScript Internet Explorer -


javascript code 

function update() {      var newamt = 0;     var newtable = document.getelementbyid("tbl");      ( var = 0; < newtable.rows.length; i++) {         innertable = newtable.rows[i].cells[0].childnodes[0];           if ( (innertable.rows[0].cells[5].childnodes[0].value != "")                 && !(isnotnumber(innertable.rows[0].cells[5].childnodes[0].value))) {             newamt = newamt + parsefloat(innertable.rows[0].cells[5].childnodes[0].value);         }      }  </script>

innertable.rows[0] throwing exception unable property '0' of undefined or null reference in internet explorer

but same piece of code working in eclipse web browser

html

<table id="tbl">  <logic:iterate name="editlist" property="list" id="editform">     <tr>         <td>             <table>                 <tr>                     <td></td>                     <td /></td>                     <td></td>                     <td /></td>                     <td></td>                     <td><html:text  name="amt" onchange="update()" /></td>                 </tr>                 <tr>                 </tr>                 <tr>                 </tr>              </table>          </td>        </tr>  </logic:iterate> </table>

stuck in 1 past 2 days. fed 1 me

thanks in advance

have try @ simpler unobtrusive code note removed inline event handler

function isnumber(n) {    return !isnan(parsefloat(n)) && isfinite(n);  }  var fields, newamt = 0;  // unobtrusive version ignoring table  window.onload = function() {    fields = document.queryselectorall("[name=amt]");    (var = 0; < fields.length; i++) {      fields[i].onkeyup = function() {        newamt = 0;        (var = 0; < fields.length; i++) {          var val = fields[i].value;          newamt += val != "" && isnumber(val) ? parsefloat(val) : 0;        }        console.log(newamt);      }    }  };    // fixing code - not using nodes ie too:    function update() {    var newamt = 0;    var newtable = document.getelementbyid("tbl");    (var = 0; < newtable.rows.length; i++) {      var innertable = newtable.rows[i].cells[0].getelementsbytagname('table')[0],        input = innertable.rows[0].cells[5].getelementsbytagname('input'),        val = input && input.length ? input[0].value : 0;        if (val!="" && isnumber(val)) {        newamt += parsefloat(val);      }    }    console.log(newamt);  }  
just start typing numbers    <table id="tbl">    <tr>      <td>        <table>          <tr>            <td></td>            <td></td>            <td></td>            <td></td>            <td></td>            <td><input type="text" name="amt" /></td>          </tr>          <tr>            <td></td>          </tr>          <tr>            <td></td>          </tr>        </table>      </td>    </tr>    <tr>      <td>        <table>          <tr>            <td></td>            <td></td>            <td></td>            <td></td>            <td></td>            <td><input type="text" name="amt" /></td>          </tr>          <tr>            <td></td>          </tr>          <tr>            <td></td>          </tr>        </table>      </td>    </tr>    <tr>      <td>        <table>          <tr>            <td></td>            <td></td>            <td></td>            <td></td>            <td></td>            <td><input type="text" name="amt" /></td>          </tr>          <tr>            <td></td>          </tr>          <tr>            <td></td>          </tr>        </table>      </td>    </tr>    <tr>      <td>        <table>          <tr>            <td></td>            <td></td>            <td></td>            <td></td>            <td></td>            <td><input type="text" name="amt" /></td>          </tr>          <tr>            <td></td>          </tr>          <tr>            <td></td>          </tr>        </table>      </td>    </tr>  </table>    <hr>  <button type="button" onclick="update()">test fixed code</button>


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