Lab15

2023-03-30 13:50:50 -05:00
parent e6549f9343
commit bf8d402aa7
72 changed files with 1665 additions and 0 deletions
--- a/ZIPs/JavaScript/ch7/ex_7_8.html
+++ b/ZIPs/JavaScript/ch7/ex_7_8.html
@@ -0,0 +1,58 @@
+<html>
+<head>
+<title>Example 7.8</title>
+<script>
+function getDiscount()
+{
+	var item = " ";
+	item = prompt("What is the item you want to buy?");
+	cost = parseFloat(prompt("How much does this item cost?"));
+	cost = checkNum(cost);
+	if (cost < 50 && cost > 0)
+	{
+		rate = .10;
+		salePrice = cost * (1 - rate);
+	}
+	else
+		if (cost >= 50 && cost < 100)
+		{
+			rate = .15;
+			salePrice = cost * (1 - rate);
+		}
+		else
+			if (cost >= 100)
+			{
+			rate = .20; 
+			salePrice = cost * (1 - rate);
+			}
+			else
+			{
+				rate = 0;
+				salePrice = 0;
+			}
+	document.getElementById('item').innerHTML = item;
+	document.getElementById('orig_price').innerHTML = ("$ " + cost.toFixed(2));
+	document.getElementById('discount').innerHTML = ((rate * 100) + "%");
+	document.getElementById('result').innerHTML = ("$ " + salePrice.toFixed(2));	
+}
+	function checkNum(num)
+	{
+		if (num < 0)
+		{
+			alert("Invalid cost entered");
+			num = 0;
+		}
+		return num;
+	}
+		
+</script>
+</head>
+<body><table align="center" width = "70%"><tr><td><br />
+<input type ="button" onclick="getDiscount()" value = "How much will you save? Find out now"></button><br />
+<h3>You plan to purchase: <span id = "item">&nbsp;</span></h3>
+<h3>The original cost is: <span id = "orig_price">&nbsp;</span></h3>
+<h3>The discount rate is: <span id = "discount">&nbsp;</span></h3>
+<h3>You pay: <span id = "result">&nbsp;</span></h3>
+</td></tr></table>
+</body>
+</html>