Drop down menu Count dropdownlist具有值
我有3个下拉列表Drop down menu Count dropdownlist具有值,drop-down-menu,count,Drop Down Menu,Count,我有3个下拉列表 <select> <option value = "10">10</option> <option value = "20">20</option> <option selected="selected" value="30">30</option> </select> <select> <option value = "10">10&
<select>
<option value = "10">10</option>
<option value = "20">20</option>
<option selected="selected" value="30">30</option>
</select>
<select>
<option value = "10">10</option>
<option value = "20">20</option>
<option selected="selected" value="30">30</option>
</select>
<select>
<option value = "10">10</option>
<option selected="selected" value = "20">20</option>
<option value="30">30</option>
</select>
10
20
30
10
20
30
10
20
30
我想使用jquery或javascript计算数字dropdownlist selected value=30。在这里返回数字dropdownlist=2。这不是最好的解决方案,但我认为它满足您的要求
var count = 0;
var ddlList = document.getElementsByTagName('select');
for (var k = 0; k < ddlList.length; k++) {
if (ddlList.value == '30') {
count++;
}
}
alert(count);
var计数=0;
var ddlist=document.getElementsByTagName('select');
for(var k=0;k
那么,你用什么代码来计算呢?