Jquery Ajax

<script type="text/javascript">
$(function(){
	$("#ajaxDemo").click(function() {
		$.get("admin/ajax.do?url=abc&id=" + Math.random(), function(data, status) {
			p = data;
			$("div[class=bar]").css("width", p + "%");
			if (p < 100) {
				var timer = setTimeout("getProcess()", 100);
			} else {
				$("#stle").removeClass("active");
			}
		});
	});
});
</script>

$.ajax({
			url: "check.do",
			type: "GET",
			data: {"userName":userName, "id": Math.random()},
			contentType: 'application/json;charset=UTF-8',
			dataType: "json",
			beforeSend: function(){
				//$("#loading").text("detecting...");
				//$("#loading").click();
				//$("#loading").attr("data-content", "detecting...").click();
			},
			success: function(data, status){
				if("success" == status) {
					//$("#loading").attr("data-delay", "{show: 500, hide: 100}");
					$("#loading").attr("data-content", data.data).click();
					//$("#loading").text(data.data);
				}
			},
			error: function() {
				$("#loading").text("something wrong");
			}
		});

http://api.jquery.com/jQuery.post/