stublackett Posted September 18, 2009 Share Posted September 18, 2009 Hi Guys, I've got a purchase system setup on my website... Theres a box titled "quantity" all I want to do is update the total as per the quantity amount.. We charge £45 for the product, So if 1 was entered, Obviously the script would need to do X * 45. Never really touched JavaScript before, so any help / pointers would be appreciated. Example form is @ : http://www.stuartblackett.com/order.php All I want it to do is work out the "Quantity" in the box, Then * 45.. I can do the PHP stuff to calculate the rest, Its just the Java I need.. Possibly AJAX, I dunno hopefully you guys can tell me Link to comment https://forums.phpfreaks.com/topic/174679-javascript-form-update/ Share on other sites More sharing options...
stublackett Posted September 18, 2009 Author Share Posted September 18, 2009 Just an update... I've found a script somewhere, Tried playing about with it. Hopefully along the right lines....... <html> <head> <script type="text/javascript"> function UpdateQuantity() { this.form.total.value = this.form.quantity * 45; } document.onkeydown=UpdateQuantity; </script> </head> <body> <form name="form" method="post" > Quantity:<br /> <input name="quantity" onfocus="UpdateQuantity();" onkeydown="UpdateQuantity();" type="text" /> <br /> Cost: <input name="total" type="text" value="0" size="5" /> </form> </body> </html> Link to comment https://forums.phpfreaks.com/topic/174679-javascript-form-update/#findComment-920602 Share on other sites More sharing options...
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