function isvalid()
{
	var f = document.loginfrm;
	
	var email = trim(f.emailadd.value);
	if (email == "" || !WM.utility.validEmail(email))
	{
		showError(f.emailadd, ER_INVALIDCREDENTIONALS, ER_ERROR);
		return false;
		
	}
	
	if (f.pass.value == "")
	{
		showError(f.pass, ER_INVALIDCREDENTIONALS, ER_ERROR);
		return false;
		
	}
	
	var date = new Date(); 
	f.timezone.value = date.getTimezoneOffset()/60 * -1;	// getTimezoneOffset() function returns in minutes & opposite sign(+/-) to GMT Time Zone.
	
	return true;
}