所以我有一张表如下:
<select id="CellLayout" style="color:#99FF00; font-family:monospace;" onChange="PipeConfigChange(this.value);">
<option>select layout</option>
<option>blinker</option>
<option>glider</option>
<option>flower</option>
<option>custom</option>
</select>
默认情况下,“选择布局”是显示的内容。点击一个按钮,我需要选择框来显示'自定义'。我试着搜索SO,但我试图在没有Jquery的情况下这样做..
答案 0 :(得分:3)
试试这个......简单......真的很有用..
<script type="text/javascript">
function fun()
{
document.getElementById("CellLayout").selectedIndex = 4;
}
</script>
<form name="f1">
<select id="CellLayout" style="color:#99FF00; font-family:monospace;" >
<option>select layout</option>
<option>blinker</option>
<option>glider</option>
<option>flower</option>
<option>custom</option>
</select>
<input type="button" onclick="fun()"/>
</form>
答案 1 :(得分:2)
您可以更改选择值,如下所示:
<select id="CellLayout" style="color:#99FF00; font-family:monospace;" onChange="PipeConfigChange(this.value);">
<option>select layout</option>
<option>blinker</option>
<option>glider</option>
<option>flower</option>
<option>custom</option>
</select>
<input type="button" value="change" onclick="change()" />
<script type="text/javascript">
function change() {
document.getElementById('CellLayout').value = 'custom';
}
</script>
答案 2 :(得分:0)
你可以尝试一下:
<select id="CellLayout" style="color:#000; font-family:monospace;" onChange="PipeConfigChange(this.value);">
<option value="0">select layout</option>
<option value="1">blinker</option>
<option value="2">glider</option>
<option value="3">flower</option>
<option value="4">custom</option>
</select>
<input id="btn" type="submit" value="setSelected">
<script type="text/javascript">
var btn = document.getElementById('btn');
btn.onclick = function(){
var layOut = document.getElementById('CellLayout');
for(var i = 0; i < layOut.length; i++){
if(layOut.options[i].value == '4'){
layOut.selectedIndex = i;
}
}
}
</script>
答案 3 :(得分:0)
根据我对你的问题的理解。可能是以下是你的答案。请检查。
在html中:
<select id="CellLayout" style="color:#99FF00; font-family:monospace;" onChange="PipeConfigChange(this.value);">
<option>select layout</option>
<option>blinker</option>
<option>glider</option>
<option>flower</option>
<option>custom</option>
</select>
<input type="button" value="clickHere" onclick="javascript:call()"/>
在javascript中:
function call() {
var textToFind = 'custom';
var dd = document.getElementById('CellLayout');
for (var i = 0; i < dd.options.length; i++) {
if (dd.options[i].text === textToFind) {
dd.selectedIndex = i;
break;
}
}
}