function submitLogin()
{
    var cntrlName = 'ctl00_pageMainContent_';
    var objLoginID = document.getElementById(cntrlName+'txtLoginID');
    var objPassword = document.getElementById(cntrlName+'txtPassword');
    
    if((objLoginID.value==null)||(js_func_trim(objLoginID.value)==''))
    {
        alert('Please provide Username.');
        objLoginID.focus();
        return false;    
    }
    if(js_func_trim(objPassword.value)=='')
    {
        alert('Please provide Password.');
        objPassword.focus();
        return false;    
    }
    return true;
}