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- Two simple pages have been written with JavaScript, leave a reference (one)
Sun Fei's homework </ title> </ head> <script> function getobjid (objName) {for (var objid = 0; objid <form1.length; objid ) IF (Window. Form1.elements [nn == objName) {Return (Objid); Break;} Return (-1);} Function SelectProvince (Form) {var Num, N, I, M; Num = getobjid ('provvice) ); M = document.form1.elements [num] .selectedIndex-1; n = document.form1.elements [Num 1] .length; for (i = n - 1; i> = 0; I -) Document .form1.ersion [Num 1] .Options [i] = NULL;</p>
<p>IF (m> = 0) {for (i = 0; i <city_show [m] .length; i ) {newOptionName = new option (city_show [m] [i], city_value [m] [i]); document. Form1.Elements [Num 1] .Options [i] = newOptionName; Document.form1.elements [Num 1] .Options [0] .selected = true;}}</p>
<p></ Script></p>
<p><script></p>
<p>Var province_show = new array (); var city_value = new array (); var city_show = new array (); var city_value = new array (); var funtype; // modified by ryan gao 2006-03-30 16:01: 09Province_Show [0] = 'Shanxi'; provaRue [0] = '2400'; city_show [0] = new array (); city_value [0] = new array (); city_show [0] [0] = 'Taiyuan'; City_Value [0] [0] = '2400'; city_show [0] [1] = 'Datong'; city_value [0] [1] = '2401'; city_show [0] [2] = 'Pingyao'; city_value [ 0] [2] = '2402'; city_show [0] [3] = 'Changzhi'; city_value [0] [3] = '2403'; province_show [1] = 'Hubei'; provaRue [1] = '0100 '; city_show [1] = new array (); city_value [1] = new array (); city_show [1] [0] =' Wuhan '; City_Value [1] [0] =' 0100 '; city_show [1] [1] = 'Jingzhou'; City_Value [1] [1] = '0101'; City_Show [1] [2] = 'Qianjiang'; City_Value [1] [2] = '0102'; city_show [1] [ 3] = 'Xiangfan'; City_Value [1] [3] = '0103'; City_Show [1] [4] = 'Huangshi'; City_Value [1] [4] = '0104'; province_show [2] = 'Guangdong '; province_value [2] =' 0200 '; city_show [2] = new array (); city_value [2] = new array (); city_show [2] [0] =' Guangzhou; city_value [2] [0] = '0200'; city_sho W [2] [1] = 'Zhuhai'; City_Value [2] [1] = '0201'; city_show [2] [2] = 'Shenzhen'; city_value [2] [2] = '0202'; city_show [ 2] [3] = 'Zhongshan'; City_Value [2] [3] = '0203'; city_show [2] [4] = 'Chaozhou'; City_Value [2] [4] = '0204'; province_show [3] = 'Fujian'; Province_Value [3] = '0300'; City_Show [3] = new array ();</p>
<p>City_value [3] = new array (); city_show [3] [0] = 'Xiamen'; city_value [3] [0] = '0300'; city_show [3] [1] = 'Fuzhou'; City_Value [3] [1] = '0301'; city_show [3] [2] = 'Putian'; City_Value [3] [2] = '0302'; city_show [3] [3] = 'Quanzhou'; city_value [3] [3] [3 ] = '0303'; city_show [3] [4] = 'Zhangzhou'; city_value [3] [4] = '0304'; </ script> <form name = form1 method = post target = _blank> <Table Name = Table1 border = 0 align = center cellspacing = 0 cellpadding = 3 width = 560> <tr> <TD align = center valign = top width = 60> <b> province </ b> </ td></p>
<p><Td align = center valign = TOP width = 60> <b> City </ b> </ td> </ tr></p>
<p><TR> <TD Width = 40% Align = Right> <select name = province style = "width: 250" size = 1 οnchange = selectProvince (this);> <option selected value = "0000"> Please select a province </ Option> <option value = "0100> Shanxi </ option> <option value =" 0100 "> Hubei </ option> <option value =" 0200 "> Guangdong </ option> <option value =" 0300 "> Fujian </ Option> </ select></p>
<p></ Td></p>
<p><Td width = 40%> <select name = city style = "width: 250" size = 1> </ select></p>
<p></ Td> </ tr></p>
<p></ Table> </ form> </ body> </ html></p></div><div class="text-center mt-3 text-grey">
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