function check()
  {
     if (document.f.name_from.value==""||document.f.name_from.value=="Enter your name")
	    {
		   document.f.name_from.value="Enter your name";
		   document.f.name_from.select();
		   return false;
		}
     else if (document.f.phone.value==""||document.f.phone.value=="Enter your phone number")
	    {
		   document.f.phone.value="Enter your phone number";
		   document.f.phone.select();
		   return false;
         }
		 else if (document.f.email_from.value==""||document.f.email_from.value=="Enter your email address")
	    {
		   document.f.email_from.value="Enter your email address";
		   document.f.email_from.select();
		   return false;
         }
		 else if (document.f.security_code.value==""||document.f.security_code.value=="Enter code")
	    {
		   document.f.security_code.value="Enter code";
		   document.f.security_code.select();
		   return false;
         }
      else
	     {
		    return true;
		 }
  }