url : 提交的地址

params : 需要封裝的引數

function post(url,params){
	var form = $("<form>");
	form.attr("style","display:none");
	form.attr("method","post");
	form.attr("action",url);
	$("body").append(form);
	if(JSON.stringify(params) != "{}"){//非空
		$.each(params,function(key,value){
			var input = $("<input>");
			input.attr("type","hidden");
			input.attr("name",key);
			input.attr("value",value);
			form.append(input);
		});
	}
	form.submit();
	form.remove();
}