javascript
公司有人要，写了一个，放上来，有要得copy去用吧，下面是第一种option的value和text是一个值得方式，下面再贴不同值得方式。
运行代码框
<form method="post" name="test"><select name="select1" ></select><select name="select2"></select><select name="select3"></select></form><script language="javascript"><!--//copyright siginie(siginie@hotmail.com),www.3ad.cnvar 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>
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