function confirmSubmit(thisForm)
{

document.getElementById("errorInfo").innerHTML="";

if (thisForm.user.value == 'IBackup Username')
{
//alert('Enter the username.')
document.getElementById("errorInfo").innerHTML="* Enter the username.";
thisForm.user.focus();
thisForm.user.select();
return false;
}else if(invalidUserName(thisForm.user.value))
   {     
	   alert('Username can contain only characters a-z, 0-9 and _ (Underscore).');
	   thisForm.user.focus();
       return (false);
}
else 
{	
	STREAMNET.verifyUser.submitDataWebfolder();
	if(document.getElementById("errorInfo").innerHTML!=''){

		return false;
	}else{
		return true;
	}

}
}


function invalidUserName(Str)
 {
	 var alloweduser = "abcdefghijklmnopqrstuvwxyz0123456789_";

	 for(var count = 0; count < Str.length; count++)
	 {
		if(alloweduser.indexOf(Str.substring(count, count + 1)) == -1)
		{
			return(true);
		}
	 };

 }