Secondary linked menu_form effects

<form name="form1"> <select name="select1" onchange="changelocation(document.form1.select1.options[document.form1.select1.selectedIndex].value)" size="1"> <option value="奥迪"> </option>Audi<option value="现代"> </option>Modern<option value="菲亚特系列"> </option>Fiat Series</select> <select name="select"> <option value="" selected> </option>Unspecified subcategory</select> </form>
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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<form name="doublecombo"> <p> <select name="example" size="1" onchange="redirect(this.options.selectedIndex)"> <option> </option>Foreign JavaScript technology website<option> </option>Domestic JavaScript technology website<option> </option>Famous foreign search engines</select> <select name="stage2" size="1"> <option value="http://wsabstract.com"> </option>Website Abstraction<option value="http://www.dynamicdrive.com"> </option>Dynamicdrive.com<option value="http://javascript.internet.com"> </option>javascript</select> <input type="button" name="test" value="Go!" onclick="go()"> </p> </form>
[Ctrl A select all Note:

If you need to introduce external Js, you need to refresh to execute ]<script> <!-- /* Double Combo Script Credit By Website Abstraction (www.wsabstract.com) Over 200+ free javascripts here! */ var groups=document.doublecombo.example.options.length var group=new Array(groups) for (i=0; i<groups; i++) group[i]=new Array() group[0][0]=new Option("Website Abstraction","http://wsabstract.com") group[0][1]=new Option("Dynamicdrive.com","http://www.dynamicdrive.com") group[0][2]=new Option("javascript","http://javascript.internet.com") group[1][0]=new Option("万旭javascript仓库","http://www.wanxu.com") group[1][1]=new Option("javascript2000","http://www.javascript2000.com") group[1][2]=new Option("无忧脚本","http://www.51js.com") group[2][0]=new Option("Hotbot","http://www.hotbot.com") group[2][1]=new Option("Infoseek","http://www.infoseek.com") group[2][2]=new Option("Excite","http://www.excite.com") group[2][3]=new Option("Lycos","http://www.lycos.com") var temp=document.doublecombo.stage2 function redirect(x){ for (m=temp.options.length-1;m>0;m--) temp.options[m]=null for (i=0;i<group[x].length;i++){ temp.options[i]=new Option(group[x][i].text,group[x][i].value) } temp.options[0].selected=true } function go(){ location=temp.options[temp.selectedIndex].value } //--> </script>