相关代码：

<script type="text/javascript">
		alert("欢迎来到颜色设置的页面");
		$("#blue").click(function(){
			$("#bg").text("");
			$("#bg").text("蓝色背景");
			$("#bg").css("background-color","blue");
		});

		$("#green").click(function(){
			$("#bg").text("");
			$("#bg").text("绿色背景");
			$("#bg").css({"background-color":"green","font-style":"italic","font-weight":"bold"});
		});

		$("input[name='color']").keypress(function(event){
			if(event.keyCode == 66){
				$("#bg").css("background-color","blue");
			}
			if(event.keyCode == 71){
				$("#bg").css("background-color","green");
			}
			$("#bg").text("");
		});		
	</script>