从< select>调用javascript函数不断变化 [英] calling javascript function from <select> onchange
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问题描述
我正在尝试从select标记的onchange属性调用javascript函数！我的问题是我将select的name属性传递给始终为null的函数.
I am trying to call a javascript function from the onchange attribute of the select tag ! My issue is that I am passing the name attribute of the select to the function which always go null.
<body>
<form action="" method="post">
<select name="slct" id="name" onchange="rohan('measurement_conversion', '<?php echo isset($_POST["slct"])?$_POST["slct"]:"null" ?>')">
<option value="yes" selected="selected"> yes </option>
<option value="nopes"> nopes </option>
<option value="may be"> May be </option>
<option value="dont know"> dont know </option>
</select>
</form>
<div id="abc">
</div>
</body>
这是我的javascript函数
And here my javascript function
<script>
function rohan(var1, var2)
{
document.getElementById("abc").innerHTML=var1 + " " + var2;
}
</script>
它总是打印为null. 任何帮助将不胜感激！
It always prints null.. Any help will be appreciated !
推荐答案
HTML:
<body>
<form action="" method="post">
<select name="slct" id="name" onchange="rohan(this.value)">
<option>Select</option>
<option value="yes" selected="selected"> yes </option>
<option value="nopes"> nopes </option>
<option value="may be"> May be </option>
<option value="dont know"> dont know </option>
</select>
</form>
</body>
JS:
<script>
function rohan(value)
{
//you can get the value from arguments itself
alert(value);
}
</script>
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