How to Solve JavaScript NULL Error

Posted by Sivakumar.S under JavaScript on 6/1/2012 | Points: 10 | Views : 1151 | Status : [Member] | Replies : 2

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Hi,

In Javascript, i am getting null error while the values are checking in the loop. For your information, in my project i already get the element id and after that through that id, i am checking the value is nothing. That time the error is displaying. How can i solve this null error, pls guide me..

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txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>');

if (txtCtrl.value == "")

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

The Error is like: Error: 'value' is null or not an object
code:0

siva

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Posted by: Gaur1982 on: 6/1/2012 [Member] Starter | Points: 25

0	Please improve this code and check it first i.e. txtCtrl is not equl to null.... txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>'); if (txtCtrl.value == "") Corrected code txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>'); if (txtCtrl != null) { if (txtCtrl.value == "") .... .... Gaurav Agrawal http://www.planetofcoders.com/ Sivakumar.S, if this helps please login to Mark As Answer. \| Alert Moderator

Please improve this code and check it first i.e. txtCtrl is not equl to null....

txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>');

if (txtCtrl.value == "")

Corrected code

txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>');

if (txtCtrl != null) 

{

    if (txtCtrl.value == "")

    ....

    ....

Gaurav Agrawal
http://www.planetofcoders.com/

Sivakumar.S, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Ajay.Kalol on: 6/4/2012 [Member] Starter | Points: 25

0	txtCtrl = document.getElementById('<%=txtRECornealReflex.ClientID%>'); if (txtCtrl != null && txtCtrl != undefined) { if (txtCtrl.value == "") .... .... } rewrite your Code Like this. Enjoy Ajay ajaypatelfromsanthal.blogspot.in Sivakumar.S, if this helps please login to Mark As Answer. \| Alert Moderator

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