function cleardata(){
	var corform = document.checkoutform;
	
	corform.subject.value = "Comment";
	
	corform.first_name.src="images/blank.gif";
	corform.firstname.value = "";
	
	corform.last_name.src="images/blank.gif";
	corform.lastname.value = "";
	
	corform.companyname.value = "";
	
	corform.email_address.src="images/blank.gif";
	corform.emailaddress.value = "";
	
	corform.phone.value = "";
	
	corform.comments.value = "";
	
	corform.subject.focus();
	return;
}


function checkdata(){
   var coform = document.checkoutform;
   
   coform.first_name.src="images/blank.gif";
   if(coform.firstname.value.length<=0){
      coform.first_name.src="images/invalid.gif";
      coform.firstname.focus();
      return;
   }

   coform.last_name.src="images/blank.gif";
   if(coform.lastname.value.length<=0){
      coform.last_name.src="images/invalid.gif";
      coform.lastname.focus();
      return;
   }

   coform.email_address.src="images/blank.gif";
   if(coform.emailaddress.value.length>0){
      if(validemail(coform.emailaddress.value)==false){
         coform.email_address.src="images/invalid.gif";
         coform.emailaddress.focus();
         return;
      }
   }

   coform.email_address.src="images/blank.gif";
   if(coform.emailaddress.value.length<=0){
      coform.email_address.src="images/invalid.gif";
      coform.emailaddress.focus();
      return;
   }

   coform.submit();
}

function validemail(emailin){
   emailin+="";
   if(emailin.length==0){return false;}

   var position=emailin.indexOf("@");
   if(position<1){return false;}

   position=emailin.indexOf(".",position+1);
   if(position<3){return false;}

   if(position==emailin.length-1){return false;}

   return true;
}