study-html.txt

1 checkbox值读取，解决uncheck，表单（FormData)未赋值问题
  checkbox checked读取值为'on'
			var f = $("#state-estimate-config-form");
			var estimateConfig = f.serializeObject();
			var checkbox = f.find("input[type=checkbox]");
			$.each(checkbox, function(key, val) {
					   estimateConfig[$(val).attr('name')] = ($(val).is(":checked") ? 1 : 0);		
				});
				
2 FormData转换成json对象
	$.fn.serializeObject = function()
	{
		var o = {};
		var a = this.serializeArray();
		$.each(a, function() {
			if (o[this.name]) {
				if (!o[this.name].push) {
					o[this.name] = [o[this.name]];
				}
				o[this.name].push(this.value || '');
			} else {
				o[this.name] = this.value || '';
			}
		});
		return o;
	};		
	
	var sampleConfig = $("#state-sample-config-form").serializeObject();	
	
3 input:file 无法设置初始值
 security reasons.
 https://stackoverflow.com/questions/20537696/remember-and-repopulate-file-input/20537822#20537822
 https://stackoverflow.com/questions/1696877/how-to-set-a-value-to-a-file-input-in-html?noredirect=1&lq=1