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Javascrip question: hi how do i make a text field value change when a radio button is clicked?

  • Like a situation where a user wants to register for a gym, and the gym has a membership type, which includes gym, zumba lesson, and taekwando..each membership type has a value(i.e amount)..and when selected, a value should appear on the text filled called Program fee.There is also an option that says membership term..with options 1 month, 3 months, 6 months, and 12 months..all of this should be calculated if a user ticks a particular filled.. Lets say each membership cost $20 per month, and a user selects 2 membership options and selects 3 months, can you help me create a code to generate an output in the text filled (Program fee)..i.e gym = $20 per month taekwando = $20 per month user selects both options and selects 3 months membership term Program fee should produce: 20 + 20 = 40 * 3 months = $120 Please i need immediate help...Thanks in advance here is my code i tried out, can you edit and fix it up please Thanks in Advance <?xml version= "1.0" encoding= "UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml… <html xmlns= "http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <script type="text/javascript"> var total = 0; function ShowPFee(obj) { var price; var i; if (obj.checked) //user must have selected the box total = total + eval(obj.value); else //user must have DEselected the box total = total - eval(obj.value); document.getElementById("gymForm").Pro… = total; return; } </script> </head> <body> <form name="gymForm" id="gymForm"> <p><b>  Membership Type:</b> <input type="checkbox" name="MembershipType1" value="20" onclick="ShowPFee(this)" class="check-1" /> Gym   <input type="checkbox" name="MembershipType2" value="20" onclick="ShowPFee(this)" class="check-2" /> Group Fitness <input type="checkbox" name="MembershipType3" value="20" onclick="ShowPFee(this)" class="check-1" /> Boxing <input type="checkbox" name="MembershipType4" value="20" onclick="ShowPFee(this)" class="check-2" /> Taekwondo </p> <p><b>  Membership Term: </b> <input type="radio" name="MembershipTerm" class="check-1" onclick="ShowPFee1(this)" /> 1 Month<input type="radio" name="MembershipTerm" class="check-2" onclick="ShowPFee1(this)" /> 6 Months <input type="radio" name="MembershipTerm" class="check-1" onclick="ShowPFee1(this)"/> 3 Months   <input type="radio" name="MembershipTerm" onclick="ShowPFee1(this)" /> 12 Months </p> <p> Program Fee $ <input type="text" name="ProgramFee" value="0" style="width:2cm; color:black; background-color:white" /> </p> </form> </body> </html>

  • Answer:

    I made this for you: http://jsfiddle.net/eBC6C/1/ it wasn't that hard. you should've been able to figure it out yourself.

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