function changeQuery(elem){
var val = elem.value;
if(parseInt(val)==4){
document.getElementById("Pr_name").style.display ="none";
document.getElementById("datetime").style.display ="block";
}
}
<select id="xuanze" onChange="changeQuery();">
<input id="Pr_name" type="text" size="12">
var val = elem.value;
if(parseInt(val)==4){
document.getElementById("Pr_name").style.display ="none";
document.getElementById("datetime").style.display ="block";
}
}
<select id="xuanze" onChange="changeQuery();">
<input id="Pr_name" type="text" size="12">
var obj = event.srcElement;
var form = obj.form;
if (obj.options[obj.selectedIndex].value == "4") {
document.getElementById('Pr_name').style.display = "none";
document.getElementById('datetime').style.display = "";
} else {
document.getElementById('Pr_name').style.display = "";
document.getElementById('datetime').style.display= "none";
}
}
如果要当下拉列表值为4的时候隐藏Pr_name输入框,显示id=datetime的div层该如何做?
function changeQuery() {
var obj = event.srcElement;
var form = obj.form;
if (obj.options[obj.selectedIndex].value == "4") {
form.Pr_name.style.display = "none";
form.datetime.style.display = "block";
} else {
form.Pr_name.style.display = "block";
form.datetime.style.display= "none";
}
}
<script language="javascript">
<!--
function changeQuery() {
var obj = event.srcElement;
var form = obj.form;
if (obj.options[obj.selectedIndex].value == "4") {
alert(form.Pr_name.parentNode.tagName)
// form.Pr_name.parentNode.style.display = "none";
form.Pr_name.style.display = "none";
datetime.style.display = "block";
} else {
form.Pr_name.style.display = "block";
datetime.style.display= "none";
}
}//-->
</script>