使用js将onclick事件添加到选择选项 [英] getting an onclick event to a select option using js
问题描述
,它过滤掉我的结果并将它们输入到一个选择框中。
var syn =< = json_encode($ SYN)?取代;
函数filterByCity(){
var e = document.getElementById(city_filter);
var city = e.options [e.selectedIndex] .value;
var selectOptions = document.getElementById('syn_list');
selectOptions.options.length = 0; (城市== syn [i] ['city'] || city =='all')的
(i = 0; i< syn.length; i ++) ){
selectOptions.options [selectOptions.options.length] = new Option(syn [i] ['name'],syn [i] ['id'] +'onclick =updateTxtContent(\' '+ syn [i] ['id'] +'\')');
$ / code $ / pre
你可能会看到我添加一个onclick监听器,每个选择选项,这在页面本身的源代码看起来不错,但如果我把它复制到编辑中,我注意到这个
我的问题是不调用updateTxtContent()函数。
< select size =10name =syn_listid =syn_listclass =span12dir = rtlstyle =text-align:right;>
< option value =13& quot; onclick =& quot; updateTxtContent('13')> option a< / option>
< option value =14& quot; onclick =& quot; updateTxtContent('14')> option b< / option>
显然应该有更好的方法来做到这一点,我不知道。
解决方案我想你想你的事件处理程序选择而不是在选项上。我的意思是小提琴
< select size =10name =syn_listid =syn_listclass =span12dir =rtlstyle =text-align:right;平变化= updateTxtContent(); >
< option value =13>选项a< / option>
< option value =14> option b< / option>
< / select>
< script>
函数updateTxtContent(){
alert($(#syn_list)。val());
}
< / script>
或者因为它看起来像你没有使用jQuery:
function updateTxtContent(){
var e = document.getElementById(syn_list);
var f = e.options [e.selectedIndex] .value;
alert(f);
}
i am having a very frustrating problem. I have this code which filters out my results and inputs them into a select box
var syn = <?=json_encode($syn)?>;
function filterByCity() {
var e = document.getElementById("city_filter");
var city = e.options[e.selectedIndex].value;
var selectOptions = document.getElementById('syn_list');
selectOptions.options.length = 0;
for (i = 0; i < syn.length; i++) {
if (city == syn[i]['city'] || city == 'all') {
selectOptions.options[selectOptions.options.length] = new Option(syn[i]['name'], syn[i]['id'] + '" onclick="updateTxtContent(\'' + syn[i]['id'] + '\')');
}
}
}
as you might see i am adding a onclick listener to every select "option" which look great in the source code of the page itself but if i copy it into an edit i notice this my problem is that the "updateTxtContent()" function is not called.
<select size="10" name="syn_list" id="syn_list" class="span12" dir="rtl" style="text-align:right;">
<option value="13" onclick="updateTxtContent('13')">option a</option>
<option value="14" onclick="updateTxtContent('14')">option b</option>
obviously there should be a better way to do this that i am not aware of.
I think you want to have your event handler on your select rather than on the option. See this fiddle for what I mean
<select size="10" name="syn_list" id="syn_list" class="span12" dir="rtl" style="text-align:right;" onchange="updateTxtContent();">
<option value="13">option a</option>
<option value="14">option b</option>
</select>
<script>
function updateTxtContent(){
alert($("#syn_list").val());
}
</script>
Or since it looks like you aren't using jQuery:
function updateTxtContent(){
var e = document.getElementById("syn_list");
var f = e.options[e.selectedIndex].value;
alert(f);
}
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