Where can I find the jQuery for place order now button?

Question

I'm trying to find the jQuery of the place order button in the onepagecheckout page.

Does anybody know how I can edit the jQuery functionality of the place order button? Please give me a suggestion.

Answer 1

There is no jQuery for the place order. Magento 1 uses prototype by default.
The js called by the button is declared in checkout/onepage/revi8ew/button.phtml and it is review.save(). the code executed is in skin/frontend/{package}/{theme}/js/opcheckout.js.
Look for the Review.prototype = { line and below that you will find the save function.

save: function(){
    if (checkout.loadWaiting!=false) return;
    checkout.setLoadWaiting('review');
    var params = Form.serialize(payment.form);
    if (this.agreementsForm) {
        params += '&'+Form.serialize(this.agreementsForm);
    }
    params.save = true;
    var request = new Ajax.Request(
        this.saveUrl,
        {
            method:'post',
            parameters:params,
            onComplete: this.onComplete,
            onSuccess: this.onSave,
            onFailure: checkout.ajaxFailure.bind(checkout)
        }
    );
},