javascript获取url参数|获取当前年份

<select id="selectYear">
	<option value="">--请选择--</option>
</select>
<script src="http://upcdn.b0.upaiyun.com/libs/jquery/jquery-1.10.2.min.js"></script>
<script>
	function getQueryString(name){
		var reg=new RegExp("(^|&)"+name+"=([^&]*)(&|$)");
		var r=window.location.search.substr(1).match(reg);
		if(r!=null)return unescape(r[2]);return null;
	}
	$(function(){
		var myDate=new Date
		var year=myDate.getFullYear()
		
		var selected=getQueryString('action')
		
		$selectYear=$('#selectYear')
		for(var i=year;i>=2013;i--){
			if(i==selected){
				$selectYear.append('<option value="'+i+'" selected>更新'+i+'年度订单收款信息</option>')
			}else{
				$selectYear.append('<option value="'+i+'">更新'+i+'年度订单收款信息</option>')
			}
		}
		$selectYear.change(function(){
			if($(this).val()){
				location.href='?action='+$(this).val()
			}
		})
	})
</script>