function check()
{  
if(!(document.form1.txt_name.value))
   { alert("Please enter your name "); document.form1.txt_name.focus();  return false; }
    if(!(document.form1.txt_company.value))
   { alert("Please enter your company"); document.form1.txt_company.focus();  return false; }
  if(!(document.form1.txt_email.value))
   { alert("Please enter the Email ID"); document.form1.txt_email.focus();  return false; }
  else
  {
		document.form1.action = "int_enquiryasp.asp"
		//document.form1.action = "intervalve_enquiry.php"
		document.form1.method = "post"
		document.form1.submit()	
	}
 }