dropdownlist之间的互相联动实现（显示与隐藏）
2024-05-06 14:12:46
供稿：网友
代码如下:
<script language="javascript" type ="text/javascript" >
var Arrchange1 =new Array ();
var Arrchange2 =new Array ();
var Arrchange3 =new Array ();
function hide(s_id,index)
{
var xxx = document .getElementById (s_id);
var oldOption = xxx.children(index);
var oldStr = oldOption.innerText;
var newOption = document.createElement('<div' + oldOption.outerHTML.match(/(</w*)([^>]*)(>)/)[2] +'>');
newOption.innerText= oldStr;
newOption.swapNode(oldOption);
//alert(xxx.innerHTML);
}
function show(s_id,index)
{
var xxx =document .getElementById (s_id);
var oldOption = xxx.children(index);
if(oldOption.tagName=='DIV')
{
var oldStr = oldOption.innerText;
var newOption = document.createElement('<option' + oldOption.outerHTML.match(/(</w*)([^>]*)(>)/)[2] +'>');
newOption.innerText = oldStr;
newOption.swapNode(oldOption);
}
//alert(xxx.innerHTML);
}
function onchange1()
{
var s_index=document .getElementById ("Ddl_question1").options[document .getElementById ("Ddl_question1").selectedIndex].value;
s_index = parseInt(s_index);
if(s_index ==0)
{
show ('Ddl_question2',Arrchange1 [0] );
show ('Ddl_question3',Arrchange1 [0] );
Arrchange1.pop();
}
else
{
Arrchange1.push(s_index);
if(Arrchange1.length>0)
{
show ('Ddl_question2',Arrchange1 [0] );
}
if(Arrchange1.length>0)
{
show ('Ddl_question3',Arrchange1 [0] );
}
hide('Ddl_question2',s_index);
hide('Ddl_question3',s_index);
}
}
function onchange2()
{
var s_index=document .getElementById ("Ddl_question2").options[document .getElementById ("Ddl_question2").selectedIndex].value;
s_index = parseInt(s_index);
if(s_index ==0)
{
show ('Ddl_question1',Arrchange1 [0] );
show ('Ddl_question3',Arrchange3 [0] );
Arrchange2.pop();
}
else
{
Arrchange2.push(s_index);
if(Arrchange2.length>0)
{
show ('Ddl_question1',Arrchange2 [0] );
}
if(Arrchange2.length>0)
{
show ('Ddl_question3',Arrchange2 [0] );
}
hide('Ddl_question1',s_index);
hide('Ddl_question3',s_index);
}
}
function onchange3()
{
var s_index=document .getElementById ("Ddl_question3").options[document .getElementById ("Ddl_question3").selectedIndex].value;
s_index = parseInt(s_index);
if(s_index ==0)
{
show ('Ddl_question1',Arrchange3 [0] );
show ('Ddl_question2',Arrchange3 [0] );
Arrchange3.pop();
}
else
{
Arrchange3.push(s_index);
if(Arrchange1.length>0)
{
show ('Ddl_question1',Arrchange3 [0] );
}
if(Arrchange2.length>0)
{
show ('Ddl_question2',Arrchange3 [0] );
}
hide('Ddl_question1',s_index);
hide('Ddl_question2',s_index);
}
}
function a() {alert("fuck ");}
</script>
<select name="Ddl_question1" id="Ddl_question1" onchange="onchange1()">
