function check_empty(form1)                                   //----------- for contact us --------
{
	if(document.form1.name.value=="")
	{
		  alert('Please enter your name.');
		  document.form1.name.focus();
		  return false;
	}
	if(document.form1.company.value=="")
	{
		  alert('Please enter company name.');
		  document.form1.company.focus();
		  return false;
	}

	if(document.form1.email.value=="")
	   {
		  alert('Please enter email address.');
		  document.form1.email.focus();
		  return false;
	   }
	else if(! isValidEmail(document.form1.email.value)) 
	 {
        alert("Please enter a valid email address");
		document.form1.email.focus();
        return false;
    }

	if(document.form1.phone.value=="")
	{
		alert("Please enter phone number.");
		document.form1.phone.focus();
		return false;
	}

	if(document.form1.subject.value=="")
	{
		alert("Please select a subject.");
		document.form1.subject.focus();
		return false;
	}
		
	
	if(document.form1.inquiry.value=="")
	{
		  alert('Please enter inquiry.');
		  document.form1.inquiry.focus();
		  return false;
	}

	if(document.form1.mcspvalue.value=="")
	{
		  alert('Please enter security code.');
		  document.form1.mcspvalue.focus();
		  return false;
	}

return true;	
}