// JavaScript Document
function GetXmlHttpObject(){
  var xmlHttp=null;
  try{
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }catch(e){
    // Internet Explorer
    try{
      	xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }catch(e){
     	 xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    }
  return xmlHttp;
}

function get_code_amount(form){
	var code=form.clientID.value;
	document.getElementById('result').innerHTML="";
	if(code=="undefined" || code=="" || code==null){
		form.CodeAmount.value="";
		form.clientID.focus();
		return;
	}else if(isNaN(code) || parseInt(code)<=0){
		form.clientID.value="";
		form.CodeAmount.value="";
		form.clientID.focus();
		return
	}else{
		xmlHttp=GetXmlHttpObject();
		if (xmlHttp==null){
			alert ("Your browser does not support AJAX!");
			return;
		}	
		var url="get_amount.php?code="+code;
		url=url+"&sid="+Math.random();
		form.loading.style.display="block";
		xmlHttp.onreadystatechange=function stateResult(){
			if(xmlHttp.readyState==4){ 
				var result=xmlHttp.responseText;
				form.loading.style.display="none";
				if(isNaN(result)){
					document.getElementById('result').innerHTML=result;	
					form.CodeAmount.value="";
					form.Amount.value="0";
				}else{
					form.CodeAmount.value=result;
					form.Amount.value=result;
					document.getElementById('result').innerHTML="";
				}
				calcsum(form,150);
			}
		}
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);	
	}
}
function calcsum(form,perticketamt){
	var guestickettotal=0;
	var regfee=form.Amount.value;
	var grosstotal=0;
	var tickets=form.Additional2.value;
	if(!isNaN(tickets) && tickets > 0 ){
		guestickettotal=parseInt(tickets)*parseInt(perticketamt);
	}
	if(!isNaN(regfee) && parseInt(regfee) > 0){
		grosstotal=guestickettotal+parseInt(regfee);
	}else{
		grosstotal=guestickettotal;
	}
	form.total.value=guestickettotal;
	form.Grosstotal.value=grosstotal;
}
function update_regamt(form,val){
	form.Amount.value=val;
	form.loading.style.display="none";
	form.clientID.value="";
	form.CodeAmount.value="";
	document.getElementById('result').innerHTML="";
}
function check_amt(form){
	var amt=form.Amount.value;
	if(amt!="undefined" || amt!=""){
		form.Amount.value=0;
	}
	form.clientID.focus();
}
function checknum(form,val,maxval){
	if(isNaN(val)|| val<=0){
		form.Additional2.value="";
	}else if(parseInt(val)>maxval){
		form.Additional2.value="";
	}
}