三级联动下拉框

三级联动下拉框

Ghost 发表于 [2005-12-23 16:19]

<FORM name="isc">
<table border="0" cellspacing="0" cellpadding="0">
  <tr align="center">
    <td nowrap height="11"> &nbsp;

<select name="example" size="1" onChange="redirect(this.options.selectedIndex)">
<option selected>---Select1-------------</option>
<option>Webmaster Sites</option>
<option>News Sites</option>
</select>

<select name="stage2" size="1" onChange="redirect1(this.options.selectedIndex)">
<option value=" " selected> </option>
<option value=" " selected>---Select2--------------</option>
<option value=" " selected>---Select2--------------</option>
</select>

<select name="stage3" size="1" onChange="redirect2(this.options.selectedIndex)">
<option value=" " selected> </option>
<option value=" " selected>---Select3----------------</option>
<option value=" " selected>---Select3----------------</option>
</select>

<script>
<!--

var groups=document.isc.example.options.length
var group=new Array(groups)
for (i=0; i<groups; i++)
group[i]=new Array()

group[0][0]=new Option("---Select2---"," ");

group[1][0]=new Option("Now Select This One"," ");
group[1][1]=new Option("JavaScript","47");
group[1][2]=new Option("DHTML","46");
group[1][3]=new Option("CGI","45");

group[2][0]=new Option("Now Select This One"," ");
group[2][1]=new Option("General News","115");
group[2][2]=new Option("Technology News","116");

var temp=document.isc.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
redirect1(0)
}

var secondGroups=document.isc.stage2.options.length
var secondGroup=new Array(groups)
for (i=0; i<groups; i++)  {
secondGroup[i]=new Array(group[i].length)
for (j=0; j<group[i].length; j++)  {
secondGroup[i][j]=new Array()  }}

secondGroup[0][0][0]=new Option("---Select 3---"," ");
secondGroup[1][0][0]=new Option("---Select 3---"," ");
secondGroup[1][1][0]=new Option("Now Select This One"," ");
secondGroup[1][1][1]=new Option("Website Abstraction"," ");
secondGroup[1][1][2]=new Option("JavaScript for the non programmer"," ");
secondGroup[1][1][3]=new Option("Java-Scripts.net"," ");

secondGroup[1][2][0]=new Option("Now Select This One"," ");
secondGroup[1][2][1]=new Option("Dynamic Drive"," ");
secondGroup[1][2][2]=new Option("Beginner\'s Guide to DHTML"," ");
secondGroup[1][2][3]=new Option("Web Coder"," ");

secondGroup[1][3][0]=new Option("Now Select This One"," ");
secondGroup[1][3][1]=new Option("CGI Resources","");
secondGroup[1][3][2]=new Option("Ada\'s Intro to CGI"," ");

secondGroup[2][0][0]=new Option("---Select 3---"," ");
secondGroup[2][1][0]=new Option("Now Select This One"," ");
secondGroup[2][1][1]=new Option("CNN"," ");
secondGroup[2][1][2]=new Option("MSNBC"," ");
secondGroup[2][1][3]=new Option("ABC News"," ");

secondGroup[2][2][0]=new Option("Now Select A Page"," ");
secondGroup[2][2][1]=new Option("News"," ");
secondGroup[2][2][2]=new Option("Wired"," ");

var temp1=document.isc.stage3
function redirect1(y){
for (m=temp1.options.length-1;m>0;m--)
temp1.options[m]=null
for (i=0;i<secondGroup[document.isc.example.options.selectedIndex][y].length;i++){
temp1.options[i]=new Option(secondGroup[document.isc.example.options.selectedIndex][y][i].text,secondGroup[document.isc.example.options.selectedIndex][y][i].value)
}
temp1.options[0].selected=true
}

function redirect2(z){
window.location=temp1[z].value
}

//-->
</script>

  </td>
  </tr>
</table>
</FORM>