javascript级联菜单，数据从数据库中获取

时间：2021-08-19 07:24:35
1.html代码：
<%@ page contentType="text/html; charset=gb2312" %>

<%@ page import="java.sql.*" %>

<html>

<head>

<!--

放置javascript代码

-->

</head>

<body style="font-size: 12px;" bgcolor="eeeeee">

<form name="form1" action="SpecialityRelation_Insert.jsp" method="get">

<img onclick="history.go(-1);" src="../../images/back_blue.gif" onmousemove="this.src='../../images/back_red.gif';" onmouseout="this.src='../../images/back_blue.gif'" style="cursor:hand;">

<hr>

<%

	String logicalclass_name = request.getParameter("name");

	String logicalclass_id = request.getParameter("logicalclass_id");

%>

<input name="logicalclass_id" value="<%=logicalclass_id%>" type="hidden">

<table border="1px">

<tr>

<td width="100px">教学班名称</td>

<td width="300px">

<input class="MyInputBox" name="name" value="<%=logicalclass_name%>" style="background:'#dddddd';" size="50" readonly/>

</td>

</tr>

<tr>

<td>所在专业</td>

<td>

<select class="MySelect" name="department" size="1" id="department" onChange="changeDepartment(document.form1.department.options[document.form1.department.selectedIndex].value)">

<%

	rs = myDao.execQuery("select * from department");

	i=0;

	for(rs.next();!rs.isAfterLast();rs.next(),i++)

	{

%>

<option value="<%=rs.getString("id")%>"><%=rs.getString("Department_name")%></option>

<%

	}

%>

</select>

<select class="MySelect" name="division" size="1" id="division" onChange="changeDivision(document.form1.division.options[document.form1.division.selectedIndex].value)">

</select>

<input type="hidden" name="Switch" value="false">

<select class="MySelect" name="speciality" id="speciality" size="1" onChange="changeSpeciality(document.form1.speciality.options[document.form1.speciality.selectedIndex].value)"></select>

<select class="MySelect" name="Grade" id="Grade" size="1" onChange="changeGrade(document.form1.Grade.options[document.form1.Grade.selectedIndex].value)">

</select> 

<select class="MySelect" name="ObjectID" size="1">

</select> 

</td>

</tr>

<tr>

<td>说明</td>

<td><textarea name="other" class="MyTextArea" name="other" cols="48" rows="10"></textarea></td>

</tr>

<tr>

<td colspan="2" align="right">

<img src="../../images/submit_blue.gif" onmousemove="this.src='../../images/submit_red.gif';" onmouseout="this.src='../../images/submit_blue.gif'" style="cursor:hand;" onclick="document.form1.submit();">

</td>

</tr>

</table>

</form>

</body>

</html>

　　





　2.javascript代码：




2.javascript代码

<script language="javascript">

var DeparmentCount; //三级联动菜单代码

DeparmentCount = 0;

var DivisionCount;

DivisionCount = 0;

var SpecialityCount;

SpecialityCount = 0;

//GradeCount = 0;

ObjectIDCount = 0;

Department = new Array();

Division = new Array();

Speciality = new Array();

//Grade = new Array();

ObjectID = new Array();

<%

system.pub.oraclesql myDao = new system.pub.oraclesql();

ResultSet rs = myDao.execQuery("select * from division");

int i=0;

for(rs.next();!rs.isAfterLast();rs.next(),i++)

{

%>

Division[<%=i%>] = new Array("<%=rs.getString("Division_name")%>","<%=rs.getString("department_id")%>","<%=rs.getString("id")%>");

<%

}//for

%>

DivisionCount = <%=i%>;

<%

	System.out.println("debug....1");

	rs = myDao.execQuery("select * from speciality");

	i=0;

	for(rs.next();!rs.isAfterLast();rs.next(),i++)

	{

%>

Speciality[<%=i%>] = new Array("<%=rs.getString("Speciality_name")%>","<%=rs.getString("division_id")%>","<%=rs.getString("id")%>");

<%

}//for

%>

 SpecialityCount = <%=i%>;

<%

	rs = myDao.execQuery("select distinct speciality_id,grade,object_id,name from student t,object o where o.id= t.object_id");

	i=0;

	for(rs.next();!rs.isAfterLast();rs.next(),i++)

	{

%>

 ObjectID[<%=i%>] = new Array("<%=rs.getString("speciality_id")%>","<%=rs.getString("grade")%>","<%=rs.getString("object_id")%>","<%=rs.getString("name")%>");

<%

}//for

%>

	ObjectIDCount = <%=i%>;

		function changeDepartment(DepartmentId)

		{

			document.form1.Switch.value="false";

			document.form1.division.length = 0;

			var DepartmentId = DepartmentId;

			var i;

			for (i=0;i < DivisionCount; i++)

			{

				if (Division[i][1] == DepartmentId)

				{

					document.form1.division.options[document.form1.division.length] = new Option(Division[i][0], Division[i][2]);

				}

			}

			changeDivision(document.form1.division.value);

			if(document.form1.division.length!=0)

			{

				document.form1.division.style.visibility = 'visible';

			}

			else

			{

				document.form1.division.style.visibility = 'hidden';

			}  

		}

		function changeDivision(DivisionId)

		{

			document.form1.Switch.value="false";

			document.form1.speciality.length = 0;

			var DivisionId = DivisionId;

			var i;

			for (i=0;i < SpecialityCount; i++)

			{

				if (Speciality[i][1] == DivisionId)

				{

					document.form1.speciality.options[document.form1.speciality.length] = new Option(Speciality[i][0], Speciality[i][2]);

				}

			}

			if(document.form1.speciality.length!=0)

			{

				document.form1.speciality.style.visibility = 'visible';

			}

			else

			{

				document.form1.speciality.style.visibility = 'hidden';

				document.form1.Grade.style.visibility = 'hidden';

				document.form1.ObjectID.style.visibility = 'hidden';

			}

			changeSpeciality(document.form1.speciality.value);

		}

		function changeSpeciality(SpecialityID)

		{

			document.form1.Switch.value="false";

			document.form1.Grade.length = 0;

			var SpecialityID = SpecialityID;

			var i,j;

			var flag = 0;

			for (i=0;i < ObjectIDCount; i++)

			{

				if(ObjectID[i][0] == SpecialityID)

				{

					for(j=0,flag=0;j<document.form1.Grade.length;j++)

					{

						if(document.form1.Grade.options[j].value==ObjectID[i][1])

						{

							flag = 1;

							break;

						}

					}

					if(flag!=1)

					{

						document.form1.Grade.options[document.form1.Grade.length] = new Option(ObjectID[i][1], ObjectID[i][1]);

					}

				}

			}

			if(document.form1.Grade.length!=0)

			{

				document.form1.Grade.style.visibility = 'visible';

			}

			else

			{

				document.form1.Grade.style.visibility = 'hidden';

				document.form1.ObjectID.style.visibility ='hidden';

			}

			changeGrade(document.form1.Grade.value);

		}

		function changeGrade(GradeID)

		{

			document.form1.Switch.value="false";

			document.form1.ObjectID.length = 0;

			var GradeID = GradeID;

			var i;

			for (i=0;i < ObjectIDCount; i++)

			{

				if(ObjectID[i][1] == GradeID && ObjectID[i][0] == document.form1.speciality.value)

				{

					document.form1.ObjectID.options[document.form1.ObjectID.length] = new Option(ObjectID[i][3],ObjectID[i][2]);

				}

			}

			if(document.form1.ObjectID.length!=0)

			{

				document.form1.ObjectID.style.visibility = 'visible';

			}

			else

			{

				document.form1.ObjectID.style.visibility = 'hidden';

			}

		}

		function  initialSelect()

		{

			changeDepartment(document.form1.department.options[document.form1.department.selectedIndex].value);

		}

		</script>





　　


　
相关文章