There are two ways to call a function with parameters:
1.
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(function(){ searchJDWater(url);},100);
}
2.
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(“searchJDWater(”+url+“)”, 100);
}
Note: When using setTimeout with parameter methods, please note that setTimeout("function name ("+parameter+")" and milliseconds), the parameters here can only be in the form of a string, and cannot be passed an object.
---------------------------
The following method is wrong, and the browser status bar will prompt that the parameters are invalid:
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(searchJDWater(url), 100);
}
--------------------------------------------------------------
Settimeout() function extension:
Many friends on the Internet are also asking such questions. Let me explain it here. Here are a few simple examples:
Search for "setTimeout with parameters" online. Many friends have written many methods to implement method loops using setTimeout with objects, such as:
<script language="javascript">
var __sto = setTimeout;
= function(callback,timeout,param)
{
var args = (arguments,2);
var _cb = function()
{
(null,args);
}
__sto(_cb,timeout);
}
//Test code
function aaaa(a)
{
alert(a);
}
function aaaaa(a,b,c)
{
alert(a + b + c);
}
var a = new Object();
(aaaa,1000,a);
(aaaaa,2000,a,6,7);
</script>
In this example, the usage of setTimeout is setTimeout (callback function, time, parameter 1,..., parameter n).
For example:
2：
<script type="text/javascript">
var _st = ;
= function(fRef, mDelay) {
if(typeof fRef == 'function'){
var argu = (arguments,2);
var f = (function(){ (null, argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
(test,1000,'fason');
</script>
In this example, it is overloaded and uses apply to callback the previous function.
Example 1:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test("+ obj +")",1000);
}
</script>
<input type="button" onclick="test(1)">
When the mouse presses this button, test() is called and "1" is passed in. A dialog box pops up every 1000 milliseconds (1 second) on the screen, showing 1, no problem.
Example 2:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test("+ obj +")",1000);
}
</script>
<input type="button" onclick="test(this)">
This can be understood here as ("btnTest"). When the mouse presses this button, it is passed to the test function. The screen displays [object].
The second time will not be displayed after 1000 milliseconds. The problem is that the script error is reported in the lower left of the browser, and the object is not defined in the details.
Example 3:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test()",1000);
}
</script>
<input type="button" onclick="test(this)">
The test() in setTimeout does not contain parameters. It displays [object] for the first time, and it displays undefined after 1000 milliseconds. The variable has not been assigned yet. In other words, this method can implement the parameter with parameters
method loop, but the parameters are destroyed.
In fact, this is very simple to implement, and there is no need to write such long code to implement it.
Example 4:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test('"+ obj +"')",1000);
}
</script>
<input type="button" onclick="test(this)">
Note that the quotes before and after the parameter obj in the test in setTimeout have a pair of single quotes in double quotes, so: setTimeout("test(single quote double quote + obj + double quote single quote
number)"), OK~ The screen displays [object] every 1000 milliseconds, and the object is successfully passed.
———————————————————————————————————————
Question: Article 4 The final pass is the string "object" of the "object" instead of the initial object obj. It's just the type of obj. It does not achieve the function of passing the object.
You can test the code: The id of the object that pops up
<body>
<div ></div>
</body>
<script language="javascript">
obj=('sssss');
function test(obj)
{
alert();
setTimeout("test('"+ obj +"')",1000);
}
test(obj)
</script>
1.
Copy the codeThe code is as follows:
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(function(){ searchJDWater(url);},100);
}
2.
Copy the codeThe code is as follows:
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(“searchJDWater(”+url+“)”, 100);
}
Note: When using setTimeout with parameter methods, please note that setTimeout("function name ("+parameter+")" and milliseconds), the parameters here can only be in the form of a string, and cannot be passed an object.
---------------------------
The following method is wrong, and the browser status bar will prompt that the parameters are invalid:
Copy the codeThe code is as follows:
function init(){
var url = "<%=basePath%>?method=searchRealWater&xzqh=" + "<%=xzqh%>" + "&rand="+();
//alert(url);
(searchJDWater(url), 100);
}
--------------------------------------------------------------
Settimeout() function extension:
Many friends on the Internet are also asking such questions. Let me explain it here. Here are a few simple examples:
Search for "setTimeout with parameters" online. Many friends have written many methods to implement method loops using setTimeout with objects, such as:
Copy the codeThe code is as follows:
<script language="javascript">
var __sto = setTimeout;
= function(callback,timeout,param)
{
var args = (arguments,2);
var _cb = function()
{
(null,args);
}
__sto(_cb,timeout);
}
//Test code
function aaaa(a)
{
alert(a);
}
function aaaaa(a,b,c)
{
alert(a + b + c);
}
var a = new Object();
(aaaa,1000,a);
(aaaaa,2000,a,6,7);
</script>
In this example, the usage of setTimeout is setTimeout (callback function, time, parameter 1,..., parameter n).
For example:
2：
Copy the codeThe code is as follows:
<script type="text/javascript">
var _st = ;
= function(fRef, mDelay) {
if(typeof fRef == 'function'){
var argu = (arguments,2);
var f = (function(){ (null, argu); });
return _st(f, mDelay);
}
return _st(fRef,mDelay);
}
function test(x){
alert(x);
}
(test,1000,'fason');
</script>
In this example, it is overloaded and uses apply to callback the previous function.
Example 1:
Copy the codeThe code is as follows:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test("+ obj +")",1000);
}
</script>
<input type="button" onclick="test(1)">
When the mouse presses this button, test() is called and "1" is passed in. A dialog box pops up every 1000 milliseconds (1 second) on the screen, showing 1, no problem.
Example 2:
Copy the codeThe code is as follows:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test("+ obj +")",1000);
}
</script>
<input type="button" onclick="test(this)">
This can be understood here as ("btnTest"). When the mouse presses this button, it is passed to the test function. The screen displays [object].
The second time will not be displayed after 1000 milliseconds. The problem is that the script error is reported in the lower left of the browser, and the object is not defined in the details.
Example 3:
Copy the codeThe code is as follows:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test()",1000);
}
</script>
<input type="button" onclick="test(this)">
The test() in setTimeout does not contain parameters. It displays [object] for the first time, and it displays undefined after 1000 milliseconds. The variable has not been assigned yet. In other words, this method can implement the parameter with parameters
method loop, but the parameters are destroyed.
In fact, this is very simple to implement, and there is no need to write such long code to implement it.
Example 4:
Copy the codeThe code is as follows:
<script language="javascript">
function test(obj)
{
alert(obj);
setTimeout("test('"+ obj +"')",1000);
}
</script>
<input type="button" onclick="test(this)">
Note that the quotes before and after the parameter obj in the test in setTimeout have a pair of single quotes in double quotes, so: setTimeout("test(single quote double quote + obj + double quote single quote
number)"), OK~ The screen displays [object] every 1000 milliseconds, and the object is successfully passed.
———————————————————————————————————————
Question: Article 4 The final pass is the string "object" of the "object" instead of the initial object obj. It's just the type of obj. It does not achieve the function of passing the object.
You can test the code: The id of the object that pops up
Copy the codeThe code is as follows:
<body>
<div ></div>
</body>
<script language="javascript">
obj=('sssss');
function test(obj)
{
alert();
setTimeout("test('"+ obj +"')",1000);
}
test(obj)
</script>