Super simple js level-2 linkage menu

Source: Internet
Author: User
Tip: you can modify some code before running

<script language="javascript">Subcat = new Array (); subcat [0] = new Array ("test store", "1", "1 "); subcat [1] = new Array ("Jiangxi RongYu Pharmaceutical Group Co., Ltd.", "1", "2"); var onecount = 2; function changelocation (locationid) {document. registerform. cityareaid. length = 1; var locationid = locationid; var I; var nindex; for (I = 0; I <onecount; I ++) {if (subcat [I] [1] = locationid) {document. registerform. cityareaid. options [document. registerform. cityareaid. length] = new O Ption (subcat [I] [0], subcat [I] [2]) ;}} function doChange (objText, objDrop) {if (! ObjDrop) return; var str = objText. value; var arr = str. split ("|"); var nIndex = objDrop. selectedIndex; objDrop. length = 1; for (var I = 0; I<arr.length; i++){objDrop.options[objDrop.length] = new Option(arr[i], arr[i]);}objDrop.selectedIndex = nIndex;}</script><form name="registerform" id="registerform" method="POST" action=""><select name="cityid" id="cityid" onblur="changelocation(document.registerform.cityid.options[document.registerform.cityid.selectedIndex].value)"><option value="">-- Unlimited city --</option><option value=1>Changsha 1861 e-commerce Co., Ltd.</option><option value=2>Test</option><option value=3>Changsha 1861 e-commerce Co., Ltd.</option><option value=4>Changsha 1861 e-commerce Co., Ltd.</option><option value=5>Changsha 1861 e-commerce Co., Ltd.</option><option value=6>Changsha 1861 e-commerce Co., Ltd.</option><option value=7>Changsha 1861 e-commerce Co., Ltd.</option><option value=8>Changsha 1861 e-commerce Co., Ltd.</option><option value=9>Changsha 1861 e-commerce Co., Ltd.</option><option value=10>Changsha 1861 e-commerce Co., Ltd.</option><option value=11>Changsha 1861 e-commerce Co., Ltd.</option><option value=12>Changsha 1861 e-commerce Co., Ltd.</option><option value=13>Changsha 1861 e-commerce Co., Ltd.</option><option value=14>Changsha 1861 e-commerce Co., Ltd.</option><option value=15>Changsha 1861 e-commerce Co., Ltd.</option><option value=16>Changsha 1861 e-commerce Co., Ltd.</option><option value=17>Changsha 1861 e-commerce Co., Ltd.</option><option value=18>Changsha 1861 e-commerce Co., Ltd.</option><option value=19>Changsha 1861 e-commerce Co., Ltd.</option><option value=20>Changsha 1861 e-commerce Co., Ltd.</option><option value=21>Changsha 1861 e-commerce Co., Ltd.</option><option value=22>Changsha 1861 e-commerce Co., Ltd.</option><option value=23>Changsha 1861 e-commerce Co., Ltd.</option><option value=24>Changsha 1861 e-commerce Co., Ltd.</option><option value=25>Changsha 1861 e-commerce Co., Ltd.</option><option value=26>Changsha 1861 e-commerce Co., Ltd.</option><option value=27>Changsha 1861 E-Commerce Company Limited aa</option><option value=28>Changsha 1861 e-commerce Co., Ltd. fds</option><option value=29>Changsha 1861 e-commerce Co., Ltd.</option><option value=30>Changsha 1861 e-commerce Co., Ltd.</option><option value=31>Changsha 1861 e-commerce Co., Ltd.</option><option value=32>Changsha 1861 E-Commerce Co. Ltd. aaaaa</option><option value=33>Ggfdsgdsgfdsgdsgdfs</option></select><select name="cityareaid" id="cityareaid"> <option value="0">-- Unlimited region --</option> </select></form>
Tip: you can modify some code before running

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