Two-level linkage menu
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new document </ title> <meta name = "generator" content = "editplus"> < Meta Name = "Author" content = "> <meta name =" keywords "content ="> <meta name = "description" content = "> <script language =" javascript "type =" text / javascript "> <! - var province_ar = new array ("Education Diploma | Tourism Management, Industrial Business Management, Secret Secret, Finance, International Trade, Accounting, English, Computer Application, Law, Art Design", "Adult Higher Education | Business Enterprise Management, International Economics and Trade, Foreign Trade English, Computer Application and Management, Art Design, "Higher Education Self-study | Hotel Management, Industrial and Commercial Enterprise Management, Sino - British Cooperative Business Management, Insurance, International Trade, English, E-Commerce, Computer and Applications, Law, Advertising "); function show_province () {var pro_tmp = document.all.Province; for (m = pro_tmp.Options.LENGTH-1; m> 0; m -) Pro_TMP.Options [m] = null; for (i = 0; i <province_ar.length; i ) {if (province_ar [i]! = ") {TMP = province_ar [i] .split (" | "); pro_tmp.Options [i] = new option TMP [0], TMP [0]);}}} function show_city (sc) {var temp = document.all.city; for (m = Temp.Options.Length-1; m> 0; m -) TEMP .OPTIONS [M] = NULL; if (province_ar [sc]! = "") {TMP = province_ar [sc] .split ("|"); TMP = TMP [1]; TMP = TMP.SPLIT ("," ); for (i = 0; i <tmp.length; i ) {TEMP.O Ptions [i] = new option (TMP [i], TMP [I]);}}} settimeout ("Show_Province ();", 20); // First Search China Province Correspondence -> </ script > </ Head> <body> <form name = "testform" id = "testform"> <select id = province οnchange = show_city (this.Options.selected "> <option value =" SELECTED> Please select Category </ Option> </ select> <</p>
<p>Select ID = city> <option value = "" SELECTED> Please select professional </ option> </ select> </ form> </ body> </ html> -------------- -------------------------------------------------- ------------------------------</p>
<p>Multi-level linkage menu</p>
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<p><Body> <select name = "s1"> <option> Need JavaScript to display </ select> <select name = "s2"> <select> <select name = "s3"> </ select> <select name> <select> <select name = "S4"> </ select> <script language = "javascript"> <! - // Select box name selector = ["s1", "s2", "s3", "s4"]; // selection Item: "Name", "Value", child selection menu = ["Earth", "1", ["China", "86", ["Beijing", "BJ", ["-", "1" , Null], "Sichuan", "SC", ["Chengdu", "28", NULL, "Leshan", "", NULL, "Panzhihua", ", NULL," Zigong ",", NULL, "Deyang", "", NULL, "Mianyang", "", null], "rice", "1", ["California", "CA", [San Francisco "," 1 ", NULL," Los Angeles " "," 2 ", NULL]," Washington "," WA ", [" Seattle "," Seattle ", Null]]]," Mars "," 2 ", [" Grand Canyon "," 86 ", [ "Small Hill", "BJ", ["A area", "28", NULL, "B", "", NULL, "C area", "", null]]]; function wizz (level) {IF (Level == 0) a = menu; Else {str = "menu"; for (i = 0; i <level; i ) Str = "[" (Document.all [Selector [I]]. SELECTEDINDEX * 3 2) "]"; A = evAl (STR);} if (a == null) return; s = Document.all [selector [level]]; i = s.ley (While (i> 0) S.Options [- i] = null; while (i <math.fllor) Length / 3)) S.Options [i] = Option (a [i * 3], a [i * 3 1]); s.onchange =</p></div><div class="text-center mt-3 text-grey">
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