function checkscript()
{
    if (document.bannerForm.name.value==0)
  {
    alert('Please enter name');
    document.bannerForm.name.focus;
    return false;
  }
  
if((document.bannerForm.tel.value==0) && (document.bannerForm.mail.value==0))
{
   alert('Please enter phone or email');
 document.bannerForm.mail.focus;
return false;
	
 }
   
// all checks passed return true
  return true;
}