Javascript 下拉式onchange函数调用不起作用
在我的页面中,我使用了一个下拉列表。更改下拉列表值时,它将调用名为sample的函数。但onchange函数不起作用。任何人都可以帮我解决这个问题Javascript 下拉式onchange函数调用不起作用,javascript,jquery,html,onchange,Javascript,Jquery,Html,Onchange,在我的页面中,我使用了一个下拉列表。更改下拉列表值时,它将调用名为sample的函数。但onchange函数不起作用。任何人都可以帮我解决这个问题 <!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <title>jQuery UI Autocomplete - Combobox</title> <link r
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>jQuery UI Autocomplete - Combobox</title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.1/themes/base/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.1/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<style>
.ui-combobox {
position: relative;
display: inline-block;
}
.ui-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
/* support: IE7 */
*height: 1.7em;
*top: 0.1em;
}
.ui-combobox-input {
margin: 0;
padding: 0.3em;
}
</style>
jQuery UI自动完成-组合框
.ui组合框{
位置:相对位置;
显示:内联块;
}
.ui组合框切换{
位置:绝对位置;
排名:0;
底部:0;
左边距:-1px;
填充:0;
/*支持:IE7*/
*高度:1.7em;
*顶部:0.1米;
}
.ui组合框输入{
保证金:0;
填充:0.3em;
}
JS文件
<script>
(function( $ ) {
$.widget( "ui.combobox", {
_create: function() {
var input,
that = this,
wasOpen = false,
select = this.element.hide(),
selected = select.children( ":selected" ),
value = selected.val() ? selected.text() : "",
wrapper = this.wrapper = $( "<span>" )
.addClass( "ui-combobox" )
.insertAfter( select );
function removeIfInvalid( element ) {
var value = $( element ).val(),
matcher = new RegExp( "^" + $.ui.autocomplete.escapeRegex( value ) + "$", "i" ),
valid = false;
select.children( "option" ).each(function() {
if ( $( this ).text().match( matcher ) ) {
this.selected = valid = true;
return false;
}
});
if ( !valid ) {
// remove invalid value, as it didn't match anything
$( element )
.val( "" )
.attr( "title", value + " didn't match any item" )
.tooltip( "open" );
select.val( "" );
setTimeout(function() {
input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
input.data( "ui-autocomplete" ).term = "";
}
}
input = $( "<input>" )
.appendTo( wrapper )
.val( value )
.attr( "title", "" )
.addClass( "ui-state-default ui-combobox-input" )
.autocomplete({
delay: 0,
minLength: 0,
source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( select.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" +
$.ui.autocomplete.escapeRegex(request.term) +
")(?![^<>]*>)(?![^&;]+;)", "gi"
), "<strong>$1</strong>" ),
value: text,
option: this
};
}) );
},
select: function( event, ui ) {
ui.item.option.selected = true;
that._trigger( "selected", event, {
item: ui.item.option
});
},
change: function( event, ui ) {
if ( !ui.item ) {
removeIfInvalid( this );
}
}
})
.addClass( "ui-widget ui-widget-content ui-corner-left" );
input.data( "ui-autocomplete" )._renderItem = function( ul, item ) {
return $( "<li>" )
.append( "<a>" + item.label + "</a>" )
.appendTo( ul );
};
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.tooltip()
.appendTo( wrapper )
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass( "ui-corner-all" )
.addClass( "ui-corner-right ui-combobox-toggle" )
.mousedown(function() {
wasOpen = input.autocomplete( "widget" ).is( ":visible" );
})
.click(function() {
input.focus();
// close if already visible
if ( wasOpen ) {
return;
}
// pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
});
input.tooltip({
tooltipClass: "ui-state-highlight"
});
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
$(function() {
$( "#combobox" ).combobox();
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
});
function sample()
{
alert("testing");
}
</script>
</head>
<body>
(函数($){
$.widget(“ui.combobox”{
_创建:函数(){
var输入,
那=这个,
wasOpen=false,
select=this.element.hide(),
selected=select.children(“:selected”),
value=selected.val()?selected.text():“”,
包装器=此。包装器=$(“”)
.addClass(“ui组合框”)
.insertAfter(选择);
函数removeIfInvalid(元素){
var值=$(元素).val(),
matcher=newregexp(“^”+$.ui.autocomplete.escapeRegex(value)+“$”,“i”),
有效=错误;
select.children(“选项”).each(函数(){
if($(this).text().match(matcher)){
this.selected=valid=true;
返回false;
}
});
如果(!有效){
//删除无效值,因为它与任何内容都不匹配
$(元素)
.val(“”)
.attr(“标题”,值+“不匹配任何项目”)
.工具提示(“打开”);
选择.val(“”);
setTimeout(函数(){
input.tooltip(“close”).attr(“title”和“);
}, 2500 );
input.data(“ui自动完成”).term=“”;
}
}
输入=$(“”)
.appendTo(包装器)
.val(值)
.attr(“标题”、“名称”)
.addClass(“ui状态默认ui组合框输入”)
.自动完成({
延迟:0,
最小长度:0,
来源:功能(请求、响应){
var matcher=newregexp($.ui.autocomplete.escapeRegex(request.term),“i”);
响应(select.children(“option”).map(函数(){
var text=$(this.text();
if(this.value&(!request.term | | matcher.test(text)))
返回{
标签:text.replace(
新正则表达式(
(?![^&;]+;)(?!)(?![^&;]+;),“gi”
)“$1”,
值:文本,
选项:这个
};
}) );
},
选择:功能(事件、用户界面){
ui.item.option.selected=true;
触发(“选定”,事件{
项目:ui.item.option
});
},
更改:功能(事件、用户界面){
如果(!ui.item){
移除有效的(此);
}
}
})
.addClass(“ui小部件ui小部件内容ui左角”);
input.data(“ui自动完成”)。\u renderItem=函数(ul,项){
返回$(“”)
.append(“+item.label+”)
.附录(ul);
};
$( "" )
.attr(“tabIndex”,-1)
.attr(“标题”、“显示所有项目”)
.工具提示()
.appendTo(包装器)
.按钮({
图标:{
主要:“ui-icon-triangle-1-s”
},
文本:false
})
.removeClass(“用户界面角全部”)
.addClass(“ui右角ui组合框切换”)
.mousedown(函数(){
wasOpen=input.autocomplete(“小部件”)是(“:可见”);
})
。单击(函数(){
input.focus();
//如果已经可见,请关闭
如果(打开){
返回;
}
//将空字符串作为要搜索的值传递,显示所有结果
input.autocomplete(“搜索”和“);
});
input.tooltip({
tooltipClass:“ui状态突出显示”
});
},
_销毁:函数(){
this.wrapper.remove();
this.element.show();
}
});
})(jQuery);
$(函数(){
$(“#组合框”).combobox();
$(“#切换”)。单击(函数(){
$(“#梳
<div class="ui-widget">
<label>Your preferred programming language: </label>
<select id="combobox" onchange="sample();">
<option value="">Select one...</option>
<option value="ActionScript">ActionScript</option>
<option value="AppleScript">AppleScript</option>
<option value="Asp">Asp</option>
<option value="BASIC">BASIC</option>
<option value="C">C</option>
<option value="C++">C++</option>
<option value="Clojure">Clojure</option>
<option value="COBOL">COBOL</option>
<option value="ColdFusion">ColdFusion</option>
<option value="Erlang">Erlang</option>
<option value="Fortran">Fortran</option>
<option value="Groovy">Groovy</option>
<option value="Haskell">Haskell</option>
<option value="Java">Java</option>
<option value="JavaScript">JavaScript</option>
<option value="Lisp">Lisp</option>
<option value="Perl">Perl</option>
<option value="PHP">PHP</option>
<option value="Python">Python</option>
<option value="Ruby">Ruby</option>
<option value="Scala">Scala</option>
<option value="Scheme">Scheme</option>
</select>
</div>
<button id="toggle">Show underlying select</button>
</body>
</html>
$( "#combobox" ).autocomplete({
change: function( event, ui ) { alert("testing");}
});
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
$(".ui-combobox input").change(function(){
sample();
});
select: function( event, ui ) {
$(this).trigger("change"); // here
ui.item.option.selected = true;
that._trigger( "selected", event, {
item: ui.item.option
});
},