Copy code The code is as follows: double Select context menu Special effect code Web page languageSoftware tutorial Mouse class Window class Navigation class onClick="go()" > <br><!-- <BR>var groups=document.doublecombo.example.options.length <BR>var group=new Array(groups ) <BR>for (I=0; I<groups; I ) <BR>group[I]=new Array() <BR>group[0][0]=new Option("Mouse Class","/texiao /shubiao") <BR>group[0][1]=new Option("Window Class","/texiao/chuangkou") <BR>group[0][2]=new Option("Navigation Class"," /texiao/daohang") <BR>group[1][0]=new Option("ASP","/yuyan/asp") <BR>group[1][1]=new Option("PHP"," /yuyan/php") <BR>group[1][2]=new Option("JSP","/yuyan/jsp") <BR>group[2][0]=new Option("Dreamweaver"," /ruanjian/Dreamweaver") <BR>group[2][1]=new Option("Fireworks","/ruanjian/Fireworks") <BR>group[2][2]=new Option("Flash"," /ruanjian/Flash") <BR>group[2][3]=new Option("Photoshop","/ruanjian/Photoshop") <BR>var temp=document.doublecombo.stage2 <BR>function redirect(x) { <BR>for (m=temp.options.length-1;m>0;m--) <br>temp.options[m]=null <br>for (I=0;I<group[x] .length;I ){ <BR>temp.options[I]=new Option(group[x][I].text,group[x][I].value) <BR>} <BR>temp.options[ 0].selected=true <BR>} <BR>function go(){ <BR>location=temp.options[temp.selectedIndex].value <BR>} <BR>//--> <br>< ;/script> <br></form> <br></body> <br></html></td><br> </tr><br></table><br> </div>
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