<html>
<head>
<title>JS三级联动表单</title>
<meta http-equiv=content-Type content="text/html;charset=gb2312">
</head>
<body>
<form method="post" name="test">
<select name="select1" onchange="select()"></select>
<select name="select2"></select>
<select name="select3"></select>
</form>
<script language="javascript">
<!--
var arrText = new Array(5);
var arrValue = new Array(arrText.length);
function objSetOption(select1, select2, select3) {
this.select1 = select1;
this.select2 = select2;
this.select3 = select3;
}
arrText[0]= new objSetOption("选择1:", "选择2_1:,选择2_2:", "选择3_1:,选择3_2:");
arrText[1] = new objSetOption("论文:1", "语文:1,数学:2,英语:3", "初中:2,高中:3");
arrText[2] = new objSetOption("例题:2", "显示b2_1:值b2_1,显示b2_2:值b2_2", "显示b3_1:值b3_1,显示b3_2:值b3_2");
arrText[3] = new objSetOption("显示c:值c", "显示c2_1:值c2_1,显示c2_2:值c2_2", "显示c3_1:值c3_1,显示c3_2:值c3_2");
arrText[4] = new objSetOption("显示d:值d", "显示d2_1:值d2_1,显示d2_2:值d2_2", "显示d3_1:值d3_1,显示d3_2:值d3_2");
arrText[5] = new objSetOption("显示e:值e", "显示e2_1:值e2_1,显示e2_2:值e2_2", "显示e3_1:值e3_1,显示e3_2:值e3_2");
function select() {
var eltSelect1 = document.test.select1;
var eltSelect2 = document.test.select2;
var eltSelect3 = document.test.select3;
var arrSelect1, arrSelect2, arrSelect3;
var arrData1, arrData2, arrData3;
with(eltSelect1) {
var strSelect = options[selectedIndex].value;
}
for(i = 0;i < arrText.length;i ++) {
arrSelect1 = arrText[i].select1;
arrData1 = arrSelect1.split(":");
if (arrData1[1] == strSelect) {
arrSelect2 = (arrText[i].select2).split(",");
for(j = 0;j < arrSelect2.length;j++) {
arrData2 = arrSelect2[j].split(":");
with(eltSelect2) {
length = arrSelect2.length;
options[j].text = arrData2[0];
options[j].value = arrData2[1];
}
}
arrSelect3 = (arrText[i].select3).split(",");
for(j = 0;j < arrSelect3.length;j++) {
arrData3 = arrSelect3[j].split(":");
with(eltSelect3) {
length = arrSelect3.length;
options[j].text = arrData3[0];
options[j].value = arrData3[1];
}
}
break;
}
}
}
function init() {
var eltSelect1 = document.test.select1;
var eltSelect2 = document.test.select2;
var eltSelect3 = document.test.select3;
var arrSelect1, arrSelect2, arrSelect3;
var arrData1, arrData2, arrData3;
if (eltSelect1 != undefined && eltSelect2 != undefined && eltSelect3 != undefined) {
with(eltSelect1) {
length = arrText.length;
for(i = 0;i < arrText.length;i ++) {
arrSelect1 = arrText[i].select1;
arrData1 = arrSelect1.split(":");
options[i].text = arrData1[0];
options[i].value = arrData1[1];
}
}
with(eltSelect2) {
arrSelect2 = (arrText[0].select2).split(",");
length = arrSelect2.length;
for(i = 0;i < length;i ++) {
arrData2 = arrSelect2[i].split(":");
options[i].text = arrData2[0];
options[i].value = arrData2[1];
}
}
with(eltSelect3) {
arrSelect3 = (arrText[0].select3).split(",");
length = arrSelect3.length;
for(i = 0;i < length;i ++) {
arrData3 = arrSelect3[i].split(":");
options[i].text = arrData3[0];
options[i].value = arrData3[1];
}
}
}
}
init();
// -->
</script>
</body>
</html>
