本文实例讲述了jsp中select的onchange事件用法。分享给大家供大家参考,具体如下:
<script language = \"JavaScript\"> var onecount; onecount=0; subcat = new Array(); <% int count = 0; java.sql.ResultSet rs1 = DBManage.executeQuery(\"select hydm,zhydm,zhymc from zhy \");//读取数据 while(rs1.next()) { String selhydm=rs1.getString(\"hydm\").trim(); String zhydm=rs1.getString(\"zhydm\").trim(); String zhymc=rs1.getString(\"zhymc\").trim(); %> subcat[<%=count%>] = new Array(\"<%=zhydm%>\",\"<%=selhydm%>\",\"<%=zhymc%>\");//产生数组 <% count = count + 1; } if(rs1!=null) DBManage.closeCOnn(); %> onecount=<%=count%>; function changelocation(id) { document.form1.selzhy.length = 0; var hydm=id; var i; document.form1.selzhy.options[0] = new Option(\'选择子行业分类\',\'\'); for (i=0;i < onecount; i++) { if (subcat[i][1] == hydm) { document.form1.selzhy.options[document.form1.selzhy.length] = new Option(subcat[i][2], subcat[i][0]); } } } </script> <table width=\"500\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\"> <tr> <td width=\"180\" height=\"20\" align=\"right\">选择行业分类:</td> <td width=\"320\"> <select name=\"selhy\" onChange=\"changelocation(document.form1.selhy.options[document.form1.selhy.selectedIndex].value)\" size=\"1\" > <option value=\"2\">请选择行业分类</option> <% rs = DBManage.executeQuery(\"select * from hy\"); while(rs.next()) { String hydm=rs.getString(\"hydm\").trim(); String hymc=rs.getString(\"hymc\").trim(); %> <option value=\"<%=hydm%>\"><%=hymc%></option> <% } if(rs!=null) DBManage.closeCOnn(); %> </select> </td> </tr> <tr> <td height=\"20\" align=\"right\">选择子行业分类:</td> <td> <select name=\"selzhy\" > <option value=\"\" selected>请选择子行业分类</option> </select> </td> </tr> </table> <form name=form1> <select name=province onchange=\"cityName(this.selectedIndex)\"> <option value=\"\">请选择省名</option> </select> <select name=city> <option value=\"\">请选择城名</option> </select> </form> <script language=javascript> var city1 = [\"杭州\", \"宁波\", \"温州\", \"绍兴\", \"金华\", \"湖州\"]; var city2 = [\"南京\", \"苏州\", \"无锡\", \"常州\", \"镇江\", \"徐州\"]; var city3 = [\"合肥\", \"翕县\", \"黄山\", \"祁门\", \"休宁\"]; var city4 = [\"南昌\", \"九江\", \"赣州\", \"上饶\", \"新余\", \"景德镇\"]; var provinceName = [\"浙江\", \"江苏\", \"安徽\", \"江西\"]; function province() { var e = document.form1.province; for (var i=0; i<provinceName.length; i++) e.options.add(new Option(provinceName[i], provinceName[i])); } function cityName(n) { var e = document.form1.city; for (var i=e.options.length; i>0; i--) e.remove(i); if (n == 0) return; var a = eval(\"city\"+ n); //得到城市的数组名 for (var i=0; i<a.length; i++) e.options.add(new Option(a[i], a[i])); } function window.onload() { province(); //初始时给省名下拉菜单赋内容 } </script>
希望本文所述对大家JSP程序设计有所帮助。
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