怎么用js做一个地区选择控件的特效啊

JavaScript015

怎么用js做一个地区选择控件的特效啊,第1张

1.

首先写一个js文件，areaLocation.js:

var

provinceArray=

new

Array()

provinceArray=[

{"pname":"江苏",

"country":[

{

"cname":"南京市",

"town":["玄武区","白下区","秦淮区","建邺区","雨花台","江宁区",

"六合区","溧水县","高淳县"]},

{

"cname":"南通市",

"town":["崇川区","港闸区","启东市","如皋市","通州市","海门市","海安县","如东县"]

},

{

"cname":"苏州市",

"town":["金阊区","沧浪区","平江区","虎丘区","吴中区","张家港","昆山市","吴江市","太仓市"]

}

]

},

{"pname":"上海",

"country":[

{

"cname":"上海市",

"town":["徐汇区","普陀区","杨浦区","虹口区","卢湾区","浦东区","黄浦区","长宁区","闸北区","静安区","闵行区","松江区"]

}

]

}

]

function

areaInitialize(){

province.length=1

for(var

i

=

0i<provinceArray.lengthi++){

var

pro

=

provinceArray[i].pname

province.options[province.length]

=

new

Option(pro,pro)

}

}

function

changeCLocation(id,city){

//alert(id)

city.length

=

0

if(id>0){

var

j=id-1

var

i

var

countrys

=

new

Array()

countrys

=

provinceArray[j].country

city.options[0]

=

new

Option('不限','')

for

(i=0i

<

countrys.length

i++){

var

cname

=

countrys[i].cname

city.options[city.length]

=

new

Option(cname,

cname)

}

changeTLocation(id,1,town)

}else

if(id==0){

city.length

=

0

town.length

=

0

city.options[city.length]

=

new

Option('不限','')

town.options[town.length]

=

new

Option('不限','')

}

}

function

changeTLocation(pid,cid,town){

//alert(cid)

var

countrys

=

new

Array()

var

towns

=

new

Array()

town.length

=

0

var

i

countrys

=

provinceArray[pid-1].country

areaId

=

countrys[cid-1].areaId

towns

=

countrys[cid-1].town

city.options[0]

=

new

Option('不限','')

town.options[0]

=

new

Option('不限','')

for

(i=0i

<

towns.length

i++){

var

tname

=

towns[i]

town.options[town.length]

=

new

Option(tname,tname)

}

town.options[0]

=

new

Option('不限','')

}

2.

再写一个html页面：

<!DOCTYPE

HTML

PUBLIC

"-//W3C//DTD

HTML

4.01

Transitional//EN">

<html>

<head>

<script

type="text/javascript"

></script>

<script

type="text/javascript">

window.onload=areaInitialize()

</script>

</head>

<body>

<select

size="1">

<option

value=0

selected>--请选择--</option>

</select>

<select

size="1"

>

<option

value=0

selected>--请选择--</option>

</select>

<select

size=1>

<option

value=0

selected>--请选择--</option>

</select>

</body>

</html>

把最后一句改成这样select_pc('3','1')

不过你这代码好像有问题，我少showCity这个函数，我改了一下，如下：

<SCRIPT type=text/javascript>

function provinceRecord(ProvinceDesc, ProvinceCity){

this.Desc = ProvinceDesc

this.city = ProvinceCity

}

var city0 = new Array("请选择")

var ProvinceInfo = new Array()

ProvinceInfo[0] = new provinceRecord("请选择", city0)

var city1 = new Array()

ProvinceInfo[1] = new provinceRecord("天津", city1)

var city2 = new Array( "合肥" )

ProvinceInfo[2] = new provinceRecord("安徽", city2)

var city3 = new Array( "九江" ,"景德镇" )

ProvinceInfo[3] = new provinceRecord("江西", city3)

function showProvince(theProvince){

theProvince.options.length=0

for(i=0i<ProvinceInfo.lengthi++){

theProvince.options[i]= new Option(ProvinceInfo[i].Desc,i)

}

}

function showCity(i,obj)

{

obj.options.length=0

for(n=0n<ProvinceInfo[i].city.lengthn++)

{

obj.options[n]=new Option(ProvinceInfo[i].city[n],n)

}

}

</SCRIPT>

<FORM name="mainform" id="mainform" onSubmit="return test()" action="admin/aduser_fox.php"

method="post" encType="multipart/form-data">

<SELECT onBlur="checkArea(document.mainform.region.value,document.mainform.place2.value)" onFocus="doOnFocus('areaTip')" onChange="showCity(this.selectedIndex, place2)" name="region" id="region">

</SELECT>

<SELECT onBlur="checkArea(document.mainform.region.value,document.mainform.place2.value)" onFocus="doOnFocus('areaTip')" name="place2" id="place2">

<OPTION value="" selected>选择类型</OPTION>

</SELECT>

</FORM>

<SCRIPT language=JavaScript type=text/JavaScript>

var form_obj = document.getElementById("mainform")

showProvince(form_obj.region)

function select_pc(p,c)

{

showCity(p,form_obj.place2)

form_obj.region.value = p

form_obj.place2.value = c

}

select_pc('3','1')//修改这句。

</SCRIPT>