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copied!<p>You have functions in your increment.js script that change the value of the input after you get them in "myfuntion". You need to calculate the prices after the values are changed.</p> <p>So first you should <strong>remove</strong> the lines below from this file: </p> <p><a href="http://alpha.kentishtours.co.uk/assets/scripts/increment.js" rel="nofollow">http://alpha.kentishtours.co.uk/assets/scripts/increment.js</a></p> <pre><code>$("#increase").click(function(){ var $n = $("#adult"); $n.val(Number($n.val())+1); }); $("#decrease").click(function(){ var $n = $("#adult"); $n.val(Number($n.val())-1); }); $("#increasec").click(function(){ var $n = $("#child"); $n.val(Number($n.val())+1); }); $("#decreasec").click(function(){ var $n = $("#child"); $n.val(Number($n.val())-1); }); </code></pre> <p>Also remove the <code>onClick="myFunction()"</code> attribute in your HTML form.</p> <p>Then change all your myFunction script to this:</p> <pre><code>var adult = $('#adult'), child = $('#child'), total = $('#total'), value = $('#value'), increase = $('#increase'), decrease = $('#decrease'), increasec = $('#increasec'), decreasec = $('#decreasec'); var calulate_price = function(a, c){ var p1 = 39, p2 = 30, PA = a * p1, PC, d; if(a >= 1) PC = c * p2; else PC = c * p1; d = PA + PC; total.text(d); value.val(d); }; increase.click(function(){ var a = Number(adult.val()); var c = Number(child.val()); adult.val(++a); calulate_price(a, c); }); decrease.click(function(){ var a = Number(adult.val()); var c = Number(child.val()); adult.val(--a); calulate_price(a, c); }); increasec.click(function(){ var a = Number(adult.val()); var c = Number(child.val()); child.val(++c); calulate_price(a, c); }); decreasec.click(function(){ var a = Number(adult.val()); var c = Number(child.val()); child.val(--c); calulate_price(a, c); }); </code></pre> <p>Everything working: <a href="http://jsbin.com/ohUniCa/2/edit?js,output" rel="nofollow">http://jsbin.com/ohUniCa/2/edit?js,output</a></p>

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