JQuery二級聯動 （ each(callback)，$.each(object, [callback])）
阿新 • • 發佈：2018-12-17
1.each(callback)
HTML 程式碼:
<img/><img/>jQuery 程式碼:
$("img").each(function(i){
this.src = "test" + i + ".jpg";
});結果:
[ <img src="test0.jpg" />, <img src="test1.jpg" /> ]
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>使用jQuery完成省市二級聯動</title> <script type="text/javascript" src="../js/jquery-1.8.3.js"></script> <script> $(function() { var cities = new Array(3); cities[0] = new Array("武漢市", "黃岡市", "襄陽市", "荊州市"); cities[1] = new Array("長沙市", "郴州市", "株洲市", "岳陽市"); cities[2] = new Array("石家莊市", "邯鄲市", "廊坊市", "保定市"); cities[3] = new Array("鄭州市", "洛陽市", "開封市", "安陽市"); $("#province").change(function() { $("#city").empty(); var val = this.value; $(cities).each(function(i) { //alert(i+":"+n); if (val == i) { $(cities[i]).each(function(j) { var textNode = document.createTextNode(cities[i][j]); var opEle = document.createElement("option"); $(opEle).append(textNode); $(opEle).appendTo($("#city")); }); } }); }); }); </script> </head> <body> <select id="province"> <option>--請選擇--</option> <option value="0">湖北</option> <option value="1">湖南</option> <option value="2">河北</option> <option value="3">河南</option> </select> <select id="city"> </select> </body> </html>
2. $.each(object, [callback])
<script> $(function(){ var cities = new Array(3); cities[0] = new Array("武漢市","黃岡市","襄陽市","荊州市"); cities[1] = new Array("長沙市","郴州市","株洲市","岳陽市"); cities[2] = new Array("石家莊市","邯鄲市","廊坊市","保定市"); cities[3] = new Array("鄭州市","洛陽市","開封市","安陽市"); $("#province").change(function(){ $("#city").empty(); var val = this.value; $.each(cities,function(i,n){ if(val==i){ $.each(cities[i], function(j,m) { var textNode = document.createTextNode(m); var opEle = document.createElement("option"); $(opEle).append(textNode); $(opEle).appendTo($("#city")); }); } }); }); }); </script>