body的内容

<div class="card" id="card">
			<div id="city" class="city"></div><!-- 省份 -->
			<div id="char" class="char"></div><!-- 省内地区 -->
			<div id="dot" class="dot">.</div><!-- 小数点 -->
			<div id="ram" class="ram"></div><!-- 车牌后五位 -->
</div>

script的内容

<script type="text/javascript">
				var citys = ["京","津","晋","湘","赣","沪","渝","冀","台","辽","吉","黑","苏","浙","皖"
						,"闽","鲁","豫","鄂","青","粤","琼","川","贵","云","陕","甘","藏","桂","蒙","宁","新","港",
						"澳"
						];
						//车牌号所在地区
						var area = ["A","B","C","D","E","F","G","H","I","J","J","L","M","N","O","P","Q"]
						//车牌号后5位
						var nums = ["A","B","C","D","E","F","G","H","I","J","J","L","M","N","O","P","Q","R","S",
						"T","U","V","W","X","Y","Z","0","1","2","3","4","5","6","7","8","9"
						]
			//省份生成
			function getcity(){
    
    
				var id = Math.floor((Math.random()*34));
				return citys[id];
			}
			document.getElementById("city").innerHTML=getcity();
			//地区生成
			function getarea(){
    
    
				var id = Math.floor((Math.random()*17));
				return area[id];
			}
			document.getElementById("char").innerHTML=getarea();
			//车牌后五位
			function getend5(n){
    
    
				var res="";
				for(var i=0;i<n;i++){
    
    
					var id = Math.floor((Math.random()*36));
					res+=nums[id]
				}
				return res;
			}
			document.getElementById("ram").innerHTML=getend5(5)
</script>
```、![在这里插入图片描述](https://img-blog.csdnimg.cn/c501e4c3e92846d4aca050edf473f822.png#pic_center)