[英]Creating a querystring based on what option is selected from a drop down menu
我有这个下拉菜单:
<select name="Filter" onchange="applyFilter(this);">
<option name="Item1" id=Item1 value="10.5">Test1</option>
<option name="Item2" id=Item2 value="27">Test2</option>
<option name="Item3" id=Item3 value="31">Test3</option>
</select>
我仍在学习JavaScript,并尝试编写一个函数来生成/加载查询字符串URL,并将所选项目的值作为参数传递。 下拉菜单中的每个选项都需要具有自己的ID。 这是我到目前为止的代码:
<script language="javascript1.2" type="text/javascript">
function applyFilter()
{
var currentQS = '';
var currentObject;
var currentURL = '' + window.location.href;
currentQS = unescape(window.location.search);
var newQS = '';
currentObject = document.getElementById('Item1');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
currentObject = document.getElementById('Item2');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
currentObject = document.getElementById('Item3');
newQS = $Querystring(newQS).set(currentObject.name,currentObject.value).toString();
newQS = newQS.substring(1,newQS.length);
var newURL = 'http://' + location.hostname + location.pathname + '?' + newQS;
window.location = newURL;
}
</script>
任何帮助,将不胜感激。
不确定$Querystring
指的是什么,但是您应该可以这样做:
document.getElementsByName('Filter')[0].addEventListener('change', function() {
window.location = 'http://' + location.hostname + location.pathname + '?' + this.name + '=' + this.options[this.selectedIndex].value;
});
但是,选择菜单可能不是您要执行的操作的最佳选择。 看看这篇博客文章: http : //uxmovement.com/forms/stop-misusing-select-menus/
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