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POJavascript do-while looping problems
 

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    <p>I need help with looping the javascript in a do/while statement loop. </p> <p>The problems I am having is that I don't want to display the incorrect information in my table when entering an invalid product, but it does display in the document.write. I need help in order to make sure that the incorrect information won't be displayed. </p> <p>Also, when I hit "ok" to add more to my order, it doesn't loop it but merely displays the document.write. I want it to loop if you hit the "ok" button.</p> <p>Thank you for the help.</p> <p>Here is the code:</p> <pre><code> &lt;html&gt; &lt;head&gt;&lt;title&gt;Javascript Assignment 3: Daniel Weiner&lt;/title&gt; &lt;/head&gt; &lt;body bgcolor="brown"&gt; &lt;h1 align="center"&gt;Big Ben's Burgers-eCommerce&lt;/h1&gt; &lt;table border="1" width="100%" height="450px" bgcolor="gray"&gt;&lt;tr&gt; &lt;th align="center"&gt;Product/Service&lt;/th&gt; &lt;th align="center"&gt;Price&lt;/th&gt; &lt;th align="center"&gt;Discount&lt;/th&gt; &lt;/tr&gt; &lt;tr bgcolor="orange"&gt; &lt;td align="center"&gt;&lt;font size="3"&gt;Hamburger &lt;br&gt; &lt;br&gt; &lt;a href="http://www.mcdonalds.com/us/en/food/product_nutrition.sandwiches.256.Hamburger.html" target="_blank"&gt;Classic Hamburger&lt;/a&gt; &lt;td align="right" bgcolor="orange"&gt;&lt;font size="3"&gt;$8.00&lt;/font&gt;&lt;/td&gt; &lt;td align="center" bgcolor="orange"&gt;&lt;font size="3"&gt;.10&lt;/font&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr bgcolor="orange"&gt; &lt;td align="center"&gt;&lt;font size="3"&gt;Cheeseburger &lt;br&gt; &lt;br&gt; &lt;a href="http://www.mcdonalds.com/us/en/food/product_nutrition.sandwiches.284.cheeseburger.html" target="_blank"&gt;Classic Cheeseburger &lt;/a&gt; &lt;/font&gt;&lt;/td&gt; &lt;td align="right" bgcolor="orange"&gt;&lt;font size="3"&gt;$9.00&lt;/font&gt;&lt;/td&gt; &lt;td align="center" bgcolor="orange"&gt;&lt;font size="3"&gt;.05&lt;/font&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr bgcolor="orange"&gt; &lt;td align="center"&gt;&lt;font size="3"&gt;Soda &lt;br&gt; &lt;br&gt; &lt;a href="http://www.mcdonalds.com/us/en/food/full_menu/beverages.html" target="_blank"&gt;Fabulous Drinks&lt;/a&gt; &lt;/font&gt;&lt;/td&gt; &lt;td align="right" bgcolor="orange"&gt;&lt;font size="3"&gt;$2.00 &lt;/font&gt;&lt;/td&gt; &lt;td align="center" bgcolor="orange"&gt;&lt;font size="3"&gt; .07&lt;/font&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr bgcolor="red"&gt; &lt;td align="center"&gt;&lt;font size="3"&gt; French Fries &lt;br&gt; &lt;br&gt; &lt;a href="http://www.mcdonalds.com/us/en/food/product_nutrition.snackssides.120.small-french-fries.html" target="_blank"&gt; Fries&lt;/a&gt; &lt;/font&gt;&lt;/td&gt; &lt;td align="right" bgcolor="red"&gt;&lt;font size="3"&gt; $4.00&lt;/font&gt;&lt;/td&gt; &lt;td align="center" bgcolor="red"&gt;&lt;font size="3"&gt;.15&lt;/font&gt;&lt;/td&gt; &lt;/table&gt; &lt;script type="text/javascript"&gt; /*Daniel Weiner, Fengpeng Yuan, Javascript 2, Nov 4,2011*/ var username; var bprice= 8; var chprice= 9; var sprice= 2; var fprice= 4; var price= 0; var a; var b; var product= "hamburger, cheeseburger, soda, fries"; var quantity =0; var total; var cost = 0; var discount= 0; do{ username =prompt("Welcome to Big Ben's Burgers. Please enter your name.", ""); alert("Hello " + username+". Please look through our available products and services before placing your order.",""); product=prompt("What do you want?",""); quantity =1*prompt("How many of " +product+ " would you like?"); if (product == "hamburger") { price = bprice; discount = .1; } else if (product == "cheeseburger") { price = chprice; discount = .05; } else if (product == "soda") { price = sprice; discount = .07; } else if (product == "fries") { price = fprice; discount = .15; } else{ alert("Sorry, " +username+ " Your item not found."); } cost=price*quantity discount=price*discount*quantity total=cost-discount document.write("The cost of buying " +quantity+ " of " +product+ " is $" +cost+ ".&lt;br/&gt;"); document.write("This discount for this purchase is $" +discount+ ".&lt;br/&gt;"); }while(a==false) a = confirm("Do you want to place another order?"); (b==false) document.write("Thank you for placing an order with us, " +username+ ".&lt;br/&gt;"); document.write("The total order cost is $" +total+ "."); &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. COI retagged this as [tag:javascript] - Java and Javascript have as much in common as a car and a carrot.
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    2. CO+1 for the example.
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