Please use POST request in JSfiddle

Question

Whenever I run my code, I get an error message {"error": "Please use POST request"} Does anyone know what this error means? My code in jsfiddle: http://jsfiddle.net/Aidoboy/AdzwC/12/ code:

 /*jslint browser: true, devel: true */ function Submit() { //"use strict"; alert("running"); document.forms.form.submit(); var owed = 0; function calc(n, o) { if (n >= 90) { owed = owed + 1; if (n >= 95) { owed = owed + 1; } } else if (o >= 80) { owed = owed + 0.5; } if (n > o) { owed = owed + 0.5 * (n - o); } if (n < o) { if (n < 95) { owed = owed - 0.25; } } if (n == 94) { if (o == 97) { owed = owed + 0.25; } } } calc(form.Math.value, form.OMath.value); calc(form.Sci.value, form.OSci.value); calc(form.ELA.value, form.OELA.value); calc(form.SS.value, form.OSS.value); calc(form.Elec1.value, form.OElec1.value); calc(form.Elec2.value, form.OElec2.value); calc(form.Elec3.value, form.OElec3.value); calc(form.Elem1.value, form.OElem1.value); calc(form.Elem2.value, form.OElem2.value); calc(form.Elem3.value, form.OElem3.value); alert(Owed); }​​​​​ 

Answer 1

 document.forms.form.submit(); 

This actually sends a <form> , you cannot do this in jsFiddle ¹ . Just delete this line if you want to run JavaScript, why are you submitting the form?

_{1: You can, but not using <form> . You can test AJAX, see docs . You get the error message "Please use the POST request", because by default <form> use GET. jsFiddle doesn't like when a query string is sent, so it gave this error. You can use the POST material, but nothing will happen.}