Question

I’m having a dropdown list in my web page. And it contains two lists. 1. Yes 2.No. If we select yes then the desired text box and label will visible, else it won’t be visible. So how to do this?

Answer 1

You can use javascript to do this. Something like

<script type="text/javascript">        
        function ChangeSel(val)
        {
            var tYes = document.getElementById("txtYes");

            if ( val === "1" )
            {
                tYes.style.display = "inline";
            }
            else
            {
                tYes.style.display = "none";
            }
        }        
    </script>

<select id="sel1" onchange="ChangeSel(this.value);">
            <option value="1">Yes</option>
            <option value="2">No</option>
        </select>

<input type="text" id="txtYes" value="" />

See a working demo.