function joinNBN1() 
{ 
var obj = document.formjoin; 
if (obj.txtEmailJoin.value == "") { 
alert("Please enter your e-mail address."); 
obj.txtEmailJoin.focus(); 
return false; 
} 
else { 
if (!isValidEmail(obj.txtEmailJoin.value)) { 
obj.txtEmailJoin.focus(); 
return false; 
} 
} 
return true; 
} 

function joinNBN2() 
{ 
var obj = document.formjoin; 
var bError = 0; 
if (obj.txtEmailJoin.value == "") { 
alert("Please enter your e-mail address."); 
obj.txtEmailJoin.focus(); 
bError = 1; 
} 
else { 
if (!isValidEmail(obj.txtEmailJoin.value)) { 
obj.txtEmailJoin.focus(); 
bError = 1; 
} 
} 
if (bError == 0) obj.submit(); 
}