楼主看到javascript中写了某个方法这也许是开发者自定义的，也许是框架带的（jquery、ext等），getOptionValue这个方法不是javascript原生的，也就是说，你要在你得代码中看哪里定义了这个方法，都做了什么。我这里只能根据名字猜测一下方法的用处：获取select元素的被选择的值，因为html中option标签只有一种...
//代码结束 上面的代码会列出页面中所有select的id，获取option的value值就容易了。
In this article,we will see how to get the value of the selected option from the drop-down list in JavaScript.
The selected value of the drop-down list box (select/dropdownlist) is generally got on the server, but sometimes it needs to be got on the client. For example, if there are three levels, it need to got on the client with javascript. The dropdownlist is the server control of asp.net, ...
}if(hobbyValue.length>0) {//正确hobbyFlag=true; }else{ hobbyFlag=false; alert("爱好为必填项,最少选择一个"); }for(varj=0; j<uny.length; j++) {//会循环所有option//如果选择第一个,未选择院校,只需要判断option的value是否等于0//如果等于0:未选择,否则就可以通过if(uny[j].selected) {/...
我想使用 javascript 获取下拉栏的默认值。 在下面的代码中 alert(document.getElementById("dropdown").selected) <select id="dropdown"> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="vw">VW</option> <option value="audi" selected>Audi</option> </...
<select class="form-control" @change="changeCountry($event)"> <option value="" selected disabled>Choose</option> <option v-for="country in countries" :value="country.code" :key="country.code">{{ country.name }}</option> </select> In Vue.js each option must have a unique :key attr...
Get the selected item in dropdownlist to display relevant data in label & textbox (sqlServer, c#, VWD) Get the time remaining before a session times out. get Url Hash (#) from server side Get value asp:Textbox value using javascript Get value from database and add it into dropdownlist ...
{ display: "Strasbourg",value: "Strasbourg"}, {display: "Nice", value: "Nice"}]; // Function executes on change of first select option field. $("#country").change(function() { var select = $("#country option:selected").val(); ...
dropdownlist not displaying the selected value Dropdownlist - Add "Please Select" as first option Dropdownlist - Set datatextfield equal to multiple columns DropdownList and Setting Selected Value DropDownList binding get Databinding methods such as Eval(), XPath(), and Bind() can only be used in...