function check()
{
  if(document.frmcontactus.name.value=="")
  {
    alert("Please enter name.");
	return false;
  }
  else if(document.frmcontactus.address.value=="")
  {
    alert("Please enter address");
	return false;
  }
  else if(document.frmcontactus.email.value=="")
  {
    alert("Please enter valid email.");
	return false;
  }
  else if(document.frmcontactus.message.value=="")
  {
    alert("Please enter message.");
	return false;
  }
  else if(document.frmcontactus.email.value!="")
  {
	var str=document.frmcontactus.email.value;
	var er=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if(!er.test(str))
	{
	  alert ("Please enter your valid Email");
	  document.frmcontactus.email.select();
	  return false;
	}
    else
      return true;	
  }  
  else
    return true;
}