function RecupText2() {
var ajaxRequest = ajaxFunction();
ajaxRequest.open("GET","ajax2.php",true);
ajaxRequest.onreadystatechange = function(){
if( ajaxRequest.readyState==4 && ajaxRequest.status==200){
document.getElementById("remplir").innerHTML= ajaxRequest.responseText;
}
}
ajaxRequest.send(null);
}
var interval = setInterval(RecupText2, 1000);
设置间隔每秒更新一次选择列表，这会将所选值更改为第一个选项！谢谢！
您可以使用 HTML5 数据属性来存储所选选项。这里;下面是一个示例。此示例要求并假设使用 JQuery...
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script type="text/javascript">
(function($) {
/** THE DOM HAS FULLY LOADED & NOW JQUERY CAN INTERACT WITH IT... */
$(document).ready(function(){
//RESET THE data-selected ATTRIBUTE EACH TIME THE VALUE OF THE SELECT DROP-DOWN CHANGES
$("#options-list").on("change", function(evt){
$(this).attr("data-selected", currentElem.val());
});
// MAKE SURE TO SET THE VALUE OF THE SELECT TO THE VALUE OF THE data-selected ATTRIBUTE AT EACH INTERVAL CHANGE
// SO WITHIN THE CODE THAT UPDATES THE SELECT, DO LIKE SO
$("#options-list").val( $("#options-list").attr("data-selected") );
});
})(jQuery);
</script>
</head>
<body>
<select name="options-list" id="options-list" class="options-list" data-selected="3">
<option value="10">Ten</option>
<option value="9">Nine</option>
<option value="8">Eight</option>
<option value="7">Seven</option>
<option value="6">Six</option>
<option value="5">Five</option>
<option value="4">Four</option>
<option value="3">Three</option>
<option value="2">Two</option>
<option value="1">One</option>
</select>
</body>
</html>
希望这有所帮助....