我希望有一个选择下拉框可以同时运行两个函数，以便在同一页面上更新两个单独的div。
这是我的职能；
function showFAQ(str) {
if (str=="") {
document.getElementById("faqHint").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("faqHint").innerHTML=xmlhttp.responseText;
}
}
var category = "<?php echo $category; ?>";
var catid = "<?php echo $catid; ?>";
var subcat = "<?php echo $subcat; ?>";
var subcat2 = "<?php echo $subcat2; ?>";
var subcatid= "<?php echo $subcatid; ?>";
var fileclass= "<?php echo $fileclass; ?>";
xmlhttp.open("GET","FaqCheck.php?q="+str+ '&catid=' + catid + '&category=' + category + '&subcat=' + subcat + '&subcat2=' + subcat2 + '&subcatid=' + subcatid + '&fileclass=' + fileclass,true);
xmlhttp.send();
}
function showClass(str) {
if (str=="") {
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
var category = "<?php echo $category; ?>";
var catid = "<?php echo $catid; ?>";
var subcat = "<?php echo $subcat; ?>";
var subcat2 = "<?php echo $subcat2; ?>";
var subcatid= "<?php echo $subcatid; ?>";
var fileclass= "<?php echo $fileclass; ?>";
xmlhttp.open("GET","FileCheck.php?q="+str+ '&catid=' + catid + '&category=' + category + '&subcat=' + subcat + '&subcat2=' + subcat2 + '&subcatid=' + subcatid + '&fileclass=' + fileclass,true);
xmlhttp.send();
}
目前，我被迫使用两个下拉框来实现，但我希望它更整洁。选择代码是; 1。
<select name="fileclass" onchange="showClass(this.value)" required="">
<option value="">Select</option>
<option value="create">Create</option>
<option value="modify">Modify</option>
<option value="delete">Delete</option>
</select>
2。
<select name="faq_class" onchange="showFAQ(this.value)" required="">
<option value="">Select</option>
<option value="create">Create</option>
<option value="modify">Modify</option>
<option value="delete">Delete</option>
</select>
有关信息，faq_class和fileclass共享相同的值（总是！）
感谢您帮助新手:)
尝试在两个功能中都执行以下操作。我var在初始化xmlhttp变量时添加了关键字
var xmlhttp=new XMLHttpRequest();
这是为了使变量的范围仅是其包含函数。如果您在不使用var关键字的情况下初始化变量，则该变量将附加到window对象并在全局显示。
编辑：编辑代码以显示完整代码
function showFAQ(str) {
if (str=="") {
document.getElementById("faqHint").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
//used the keyword var before initializing xmlhttp variable
var xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("faqHint").innerHTML=xmlhttp.responseText;
}
}
var category = "<?php echo $category; ?>";
var catid = "<?php echo $catid; ?>";
var subcat = "<?php echo $subcat; ?>";
var subcat2 = "<?php echo $subcat2; ?>";
var subcatid= "<?php echo $subcatid; ?>";
var fileclass= "<?php echo $fileclass; ?>";
xmlhttp.open("GET","FaqCheck.php?q="+str+ '&catid=' + catid + '&category=' + category + '&subcat=' + subcat + '&subcat2=' + subcat2 + '&subcatid=' + subcatid + '&fileclass=' + fileclass,true);
xmlhttp.send();
}
function showClass(str) {
if (str=="") {
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
//used the keyword var before initializing xmlhttp variable
var xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
var category = "<?php echo $category; ?>";
var catid = "<?php echo $catid; ?>";
var subcat = "<?php echo $subcat; ?>";
var subcat2 = "<?php echo $subcat2; ?>";
var subcatid= "<?php echo $subcatid; ?>";
var fileclass= "<?php echo $fileclass; ?>";
xmlhttp.open("GET","FileCheck.php?q="+str+ '&catid=' + catid + '&category=' + category + '&subcat=' + subcat + '&subcat2=' + subcat2 + '&subcatid=' + subcatid + '&fileclass=' + fileclass,true);
xmlhttp.send();
}
现在，您可以在onchange只有一个下拉列表的情况下调用这两个函数，如下所示：
onchange="showClass(this.value); showFAQ(this.value);"
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