如何将表单数据转为json格式

将下面的代码直接copy到<script>标签中

$.fn.serializeJson = function() {
var serializeObj = {};
var array = this.serializeArray();
var str = this.serialize();
$(array).each(function() {
if(serializeObj[this.name]) {
if($.isArray(serializeObj[this.name])) {
serializeObj[this.name].push(this.value);
} else {
serializeObj[this.name] = [serializeObj[this.name], this.value];
}
} else {
serializeObj[this.name] = this.value;
}
});
return serializeObj;
};