validation using javascript of multiple add rows

Posted on 2011-03-15
Last Modified: 2013-12-13

I want validation of mandatory for below attached script,

I have name field like name="txt[]",Its contains multiple rows of answer..
I want to validate all added field .

<SCRIPT language="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;
                switch(newcell.childNodes[0].type) {
                    case "text":
                            newcell.childNodes[0].value = "";
                    case "checkbox":
                            newcell.childNodes[0].checked = false;
                    case "select-one":
                            newcell.childNodes[0].selectedIndex = 0;

<TABLE id="dataTable" width="350px" border="1">
            <TD><INPUT type="checkbox" name="chk[]"/></TD>
            <TD><INPUT type="text" name="txt[]"/></TD>
                <SELECT name="country[]">
                    <OPTION value="india">India</OPTION>
                    <OPTION value="germany">Germany</OPTION>
                    <OPTION value="france">France</OPTION>
                    <OPTION value="usa">United States</OPTION>
                    <OPTION value="china">china</OPTION>

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Question by:vravi22
  • 3
  • 2
LVL 17

Expert Comment

by:Shinesh Premrajan
ID: 35146124
 <TD><INPUT type="text" name="txt[]" id="txt"/></TD>

You can try assigning the id to the input field, so you can get the input field by ID

var obj= document.getElementById("txt");

alert("Please enter a value");
return false;

You can try same for other fields also.

Hope this helps

Author Comment

ID: 35146638
same thing i also tried but problem is when 2nd row  is not validated.. here id is txt validating for only 1 st row.
I want to increment id according to the add row..
LVL 17

Accepted Solution

Shinesh Premrajan earned 500 total points
ID: 35146691
Hope this helps
var obj= document.getElementsByName('txt');
 for(var i=0;i<obj.length;i++){
		alert("Please enter a value");

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Author Comment

ID: 35146980
This is worked for me .. I have changed txt to txt[] then taking whole array..

Thank you..

Author Closing Comment

ID: 35146990
This solution worked for me..

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