empty text box checking

hi,

Your alert should be first.
if you first return false then remaining code will be not execute. Because its terminate the execution after return false.
Put Alert message first and then keep return statement. it should work.

if (document.getElementById('<%=txtName.ClientID %>').values == "" && document.getElementById('<%=txtPassword.ClientID %>').values == "")
alert("Enter Username &amp; Password");
return false; 

Thanks,
Viprat

if (document.getElementById('<%=txtName.ClientID %>').value == "" && document.getElementById('<%=txtPassword.ClientID %>').value == "")
{
  alert("Enter Username & Password");
  return false; 
}

In most languages if you don't put braces to open and close the scope of the condition to be checked it only affects the first line after the condition.

As CPallini said, put the alert before the return.
And put the {} in the condition.

Hope this helps.

Try this

if (document.getElementById('<%=txtName.ClientID %>').values == "" && document.getElementById('<%=txtPassword.ClientID %>').values == "")
{
       alert("Enter Username & Password");
       return false; 
}

Faults done by you.
1.alert is written after return.(you should write alert before return).
2.If you are writing more than one line inside if clause than use curly brackets('{' '}')..(that you have not done.