在我的頁面中,我使用了一個下拉菜單。當更改下拉值時,它將調用名爲sample的函數。但onchange功能不起作用。任何人都可以幫助我解決這個問題。Dropdown onchange函數調用不起作用
<!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>
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>
HTML編碼
<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>
什麼是你寫有問題的js文件的名稱? – Hkachhia 2013-02-18 12:11:18
我從這個URL的編碼只用於自動完成功能http://jqueryui.com/resources/demos/autocomplete/combobox.html – Rithu 2013-02-18 12:13:51
沒有必要在js文件中寫腳本標記,但在你的js文件中你有寫腳本標記以及html代碼。爲什麼? – Hkachhia 2013-02-18 12:17:16