实现城市空气指数查询(不包括自动获取数据)
<body> 城市:<input type="text" id="city" name="city"><br> 空气质量:<p id="aqi"></p> <script> var arry = [["北京",100],["上海",90],["大连",50],["沈阳",90]]; var ocity = document.getElementById("city"); var oaqi = document.getElementById("aqi"); ocity.onblur = function(){ for(i=0;i<arry.length;i++){ if(arry[i][0] == ocity.value){ oaqi.innerHTML= arry[i][1]; break; }else{oaqi.innerHTML = "请输入城市名称!";} } } </script> </body>