ถามเรื่องการรับและส่งตัวแปรข้ามหน้าแบบ ajax ค่ะ ถามเรื่องการรับและส่งตัวแปรข้ามหน้าแบบ ajax ค่ะ

//ajax 
	$(document).ready(function(){
	 
	$("#btn1").click(function(){
		var txt = $("#text").val();
	
	$.ajax({
		url: "test2.php" +$('form1').serialize(),
		type: "POST",
		

		data : { Points: points,text : txt,name_img:'<?=$name_img?>'},
		
	}).success(function(result) {
		alert(result);

	});
	});
	//$(this).prop('enabled', true);
	});

$text=$_POST['text'];
$Points1=$_POST["Points"];

		$y1=(int)$Points1[1]['y'];
		$y2=(int)$Points1[2]['y'];
		
	$b1=$y1*2;
	$b2=$y2*2;
	
	$d = abs(($b1-$b2));
	$a =$text/$d; 

 $scalval1=$a; 


//ajax 
	$(document).ready(function(){
	
	$("#btn1").click(function(){
		
	$.ajax({
		url: "test3.php" +$('form1').serialize(),
		type: "POST",
		
		
		data : { Points: points,scalval1:'<?=$scalval1?>',text:'<?=$text?>',name_img:'<?=$img_scale ?>'},
		
	}).success(function(result) {
				alert(result);
	
	});
	});
	//$(this).prop('enabled', true);
	});
	

$scalval1=$_POST['scalval1'];
$text=$_POST['text'];
$Points=$_POST["Points"];

		$y1=(int)$Points[1]['y'];
		$y2=(int)$Points[2]['y'];
		
		
	$b1=$y1*2;
	$b2=$y2*2;
	
	$d = abs(($b1-$b2));
	$a =$text/$d; 
 $scalval2=$a; 
		
//ajax 
	$(document).ready(function(){
	
	$("#btn1").click(function(){
		
	
	$.ajax({
		url: "test4.php?" +$('form1').serialize(),
		type: "POST",
		
		data : { Points: points,scalval1:'<?=$scalval1?>',name_img:'<?=$img_scale?>',
		scalval2:'<?=$scalval2?>',text:'<?=$text ?>'},
		
	}).success(function(result) {
	alert(result);
	});
	});
	});