how to enable/disable textbox via java script

Hi sam, 
user have no idea what is enter in textbox, suppose user enter the some white space your condition is false. I think this a not a good idea for validate the value and one more thing i can't understand what you want disabled or hide the textbox and another control. checked like this

Remove the white space in jquery, try this code
$.trim(control id)
Enable or Disabled control 
if($('#txtfrom2').val()!='null'||$('#txtform2').val()!='')
{
ValidatorEnable('<%=yourControlName.ClientID %>', false);

}
else

{
ValidatorEnable('<%=yourControlName.ClientID %>', false);}
Hide and unhide control in jquery
if($.trim($('#txtfrom2').val())!='null'||$.trim($('#txtform2').val())!='')
{
$('#controlId').hide();

}
else

{
$('#controlId').show();

}
 
*jsb

Do check this link . It may be helpful:


http://www.techtamasha.com/disablereadonly-and-enable-textbox-using-javascript/34

You can use:

        document.getElementById("Rftxtfrom2").disabled = true;