Use ajax to change the text display drop-down list in the input box

Source: Internet
Author: User

1. Style

<Style type = "text/css">
<! --
Body {background: # fff}
. Menu {
Position: relative;
Width: 180px;
Height: 120px;
Z-index: 1;
Background: # EEE;
Border: 1px solid #666;
Margin-top:-100px;
Display: none;
}
. Menu2 {
Position: absolute;
Left: 0;
Top: 0;
Width: 100%;
Height: 120px;
Overflow: hidden;
Z-index: 1;
OVERFLOW-y: auto;
}
. Menu2 ul {margin: 0; padding: 0}
. Menu2 ul li {width: 100%; height: 25px; line-height: 20px; text-indent: 15px;
Border-bottom: 1px dashed #999; color: #333; cursor: pointer;
Change: expression (
This. onmouseover = function (){
This. style. background = "";
},
This. onmouseout = function (){
This. style. background = "";
}
)
}
Input {width: 120px}
# List1, # List2 {left: 0px; top: 103px ;}
-->
</Style>

 

2. html scripts

... Omitted Regular Script

<Tr>
<Th> automobile brand name: </th>
<Td>
<Input type = "text" id = "generalBrandName" name = "generalBrandName" value = "$ {*. generalBrandName} "style =" width: 180px "data-validation-engine =" validate [required] "<c: if test =" $ {! Empty carType. brandIdGeneral} "> disabled =" disabled "</c: if> onfocus =" showAndHide ('list1', 'show'); "onblur =" showAndHide ('list1 ', 'hide '); "/>
<Input type = "hidden" id = "brandIdGeneral" name = "brandIdGeneral" value = "$ {*. brandIdGeneral}" style = "width: 180px"/>
<Span class = "required"> required * </span>
<Div class = "Menu" id = "List1">
<Div class = "Menu2" id = "ListLi1">
<% -- <Ul> -- %>
<% -- <Li onmousedown = "getValue ('generalbrandname', 'bmw ', 'brandidgeneral', 'idx'); showAndHide ('list1', 'hide '); "> BMW </li> -- %>
<% -- <Li onmousedown = "getValue ('generalbrandname', 'audi ', 'brandidgeneral', 'idx'); showAndHide ('list1', 'hide '); "> Audi </li> -- %>
<% -- </Ul> -- %>
</Div>
</Div>

</Td>
</Tr>

... Omitted Regular Script
<Tr>
<Th> automobile manufacturer name: </th>
<Td>
<Input type = "text" id = "brandName" name = "brandName" value = "$ {*. brandName} "style =" width: 180px "data-validation-engine =" validate [required] "<c: if test =" $ {! Empty carType. brandId} "> disabled =" disabled "</c: if> onfocus =" showAndHide ('list2', 'show'); "onblur =" showAndHide ('list2 ', 'hide '); "/>
<Input type = "hidden" id = "brandId" name = "brandId" value = "$ {*. brandId}" style = "width: 180px"/>
<Span class = "required"> required * </span>
<Div class = "Menu" id = "List2">
<Div class = "Menu2" id = "ListLi2">
</Div>
</Div>

</Td>
</Tr>

 

3. Implement ajax asynchronous request filtering based on input content through JS

// When the page is loaded

JQuery (function ($ ){
If (navigator. userAgent. indexOf ("MSIE")> 0 ){
Document. getElementById ('generalbrandname'). attachEvent ("onPropertyChange", appendList );
Document. getElementById ('brandname'). attachEvent ("onPropertyChange", appendList );
}
Else if (navigator. userAgent. indexOf ("Firefox")> 0 ){
Document. getElementById ('generalbrandname'). addEventListener ("input", appendList, false );
Document. getElementById ('brandname'). addEventListener ("input", appendList, false );
}
});

/// // Pre-load
JQuery (function ($ ){
TxtValue = $ ("# generalBrandName"). val ();
//// // Bind a keyboard event to txtbox
$ ("# GeneralBrandName"). bind ("keyup", function (){
Var currentValue = $ (this). val ();
If (currentValue! = TxtValue ){
AppendList ('list1', currentValue );
TxtValue = currentValue;
}
});

TxtValue = $ ("# brandName"). val ();
//// // Bind a keyboard event to txtbox
$ ("# BrandName"). bind ("keyup", function (){
Var currentValue = $ (this). val ();
If (currentValue! = TxtValue ){
AppendList ('list2', currentValue );
TxtValue = currentValue;
}
});

});

// Function for dynamically displaying the drop-down list content

// Filter values in obj based on the values in the input box
Function appendList (obj, value ){
Value = encodeURIComponent (value); // use encodeURI () twice ()
Switch (obj ){
Case "List1": // click the value in List1 based on the vehicle brand name.
$. GetJSON (
Ctx + "/car/carmodel/**. do ",
{KeyWord: value, id: new Date (). getTime ()}, <! -- Generate a timestamp to prevent IE from using cache for the same URL -->
Function (json ){
CreateLis ('listli1', json );
}
);
Break;
Case "List2": // click the value in List2 based on the vehicle manufacturer name.
$. GetJSON (
Ctx + "/car/carmodel/**. do ",
{KeyWord: value, id: new Date (). getTime ()}, <! -- Generate a timestamp to prevent IE from using cache for the same URL -->
Function (json ){
CreateLis ('listli2', json );
}
);
Break;
}
}

Function createLis (obj, json ){
Switch (obj ){
Case "ListLi1": // click the value in List1 based on the vehicle brand name.
Var executerDiv = document. getElementById (obj); // dynamically generate a drop-down list box
ExecuterDiv. innerHTML = "";
Var ul = document. createElement ("ul ");
$. Each (json, function (I, item ){
Var li = document. createElement ("li ");
Var str = "getValue ('generalbrandname', '" + item. brandNameGeneral + "', 'brandidgeneral', '" + item. brandIdGeneral + "'); showAndHide ('list1', 'hide ')";
Li. setAttribute ("onmousedown", str );
Li. appendChild (document. createTextNode (item. brandNameGeneral ));
Ul. appendChild (li );
});
ExecuterDiv. appendChild (ul );
Break;
Case "ListLi2": // click the value in List2 based on the vehicle manufacturer name.
Var executerDiv = document. getElementById (obj); // dynamically generate a drop-down list box
ExecuterDiv. innerHTML = "";
Var ul = document. createElement ("ul ");
$. Each (json, function (I, item ){
Var li = document. createElement ("li ");
Var str = "getValue ('brandname', '" + item. brandName + "', 'brandid','" + item. brandId + "'); showAndHide ('list1', 'hide ')";
Li. setAttribute ("onmousedown", str );
Li. appendChild (document. createTextNode (item. brandName ));
Ul. appendChild (li );
});
ExecuterDiv. appendChild (ul );
Break;
}
}
// Display or hide a Layer
Function showAndHide (obj, types ){
Var layerpolicw.doc ument. getElementById (obj );
Switch (types ){
Case "show ":
Layer. style. display = "block ";
AppendList (obj ,'');
Break;
Case "hide ":
Layer. style. display = "none ";
Break;
}
}

// Obtain the content of the selected node
Function getValue (obj1, str, obj2, idx ){
Var input000000000000doc ument. getElementById (obj1 );
Input. value = str;
Var input000000000000doc ument. getElementById (obj2 );
Input. value = idx;
}

 

4. Display Results

 

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.