JS settimeout parameter transfer using introduction _javascript skills

The Window.settimeout () method calls a function with parameters in two ways:
1.

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function init () {
var url = "<%=basepath%>fetchwater.do?method=searchrealwater&xzqh=" + "<%=xzqh%>" + "&rand=" + Math.random ();
alert (URL);
Window.settimeout (function () {searchjdwater (URL);},100);
}

2.

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function init () {
var url = "<%=basepath%>fetchwater.do?method=searchrealwater&xzqh=" + "<%=xzqh%>" + "&rand=" + Math.random ();
alert (URL);
Window.settimeout ("Searchjdwater" ("+url+") ", 100);
}

Note: With the parameter method use settimeout to notice, settimeout ("function name (" + parameter + ")", milliseconds, the parameter here can only be string form, and cannot pass an object
---------------------------
The following method is incorrect and the browser status bar prompts for an invalid parameter:

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function init () {
var url = "<%=basepath%>fetchwater.do?method=searchrealwater&xzqh=" + "<%=xzqh%>" + "&rand=" + Math.random ();
alert (URL);
Window.settimeout (Searchjdwater (URL), 100);
}

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settimeout () function extension:
Many friends on the Internet are also asking such questions, I hereby explain below, I give a few simple examples:
Online lookup "with parameter settimeout", many friends wrote a lot of ways to implement the use of SetTimeout with objects of the method loop, for example:

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<script language= "JavaScript" >
var __sto = settimeout;
Window.settimeout = function (Callback,timeout,param)
{
var args = Array.prototype.slice.call (arguments,2);
var _CB = function ()
{
Callback.apply (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 ();
Window.settimeout (Aaaa,1000,a);
Window.settimeout (aaaaa,2000,a,6,7);
</script>

In this example, the settimeout usage, settimeout (callback function, time, parameter 1,..., parameter n).
Another example:
2:

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<script type= "Text/javascript" >
var _st = window.settimeout;
Window.settimeout = function (Fref, mdelay) {
if (typeof fref = = ' function ') {
var Argu = Array.prototype.slice.call (arguments,2);
var f = (function () {fref.apply (null, ARGU);});
Return _st (f, mdelay);
}
Return _st (Fref,mdelay);
}
function test (x) {
alert (x);
}
Window.settimeout (test,1000, ' Fason ');
</script>

In this case, overload the Window.settimeout and use apply to callback the previous function.
Example 1:

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<script language= "JavaScript" >
function test (obj)
{
alert (obj);
settimeout ("Test (" + obj + ")", 1000);
}
</script>
<input id= "Testbutton" type= "button" onclick= "Test (1)" >

When the mouse presses this button, call Test (), pass "1" into the screen every 1000 milliseconds (1 seconds) Pop-up dialog box, showing 1, no problem.
Example 2:

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<script language= "JavaScript" >
function test (obj)
{
alert (obj);
settimeout ("Test (" + obj + ")", 1000);
}
</script>
<input id= "btntest" type= "button" onclick= "Test (This)" >

This can be understood as document.getElementById ("btntest"), and when the mouse presses this button it passes an object to the test function, and the screen displays [object],
No longer displays the second time after 1000 milliseconds. The problem is, the browser left the next report script error, the details of the object is not defined.
Example 3:

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<script language= "JavaScript" >
function test (obj)
{
alert (obj);
settimeout ("Test ()", 1000);
}
</script>
<input id= "Testbutton" type= "button" onclick= "Test (This)" >

SetTimeout test () without parameters, the first display [object],1000 milliseconds after the undefined, the variable has not been assigned value, that is, in this way can be implemented with parameters of the party
Method Loop, but the parameters are destroyed.
In fact, this is very simple to implement, do not have to write so long code to achieve.
Example 4:

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<script language= "JavaScript" >
function test (obj)
{
alert (obj);
settimeout ("Test ('" + obj + ")", 1000);
}
</script>
<input id= "Testbutton" type= "button" onclick= "Test (This)" >

Notice that the quotation marks around the parameter obj in the test in settimeout are enclosed in double quotes with a single quotation mark, so that: settimeout ("Test" (single quote double quotation mark +obj+ double quote quote
), OK ~ Every 1000 milliseconds the screen is displayed once [object], passing the object successfully.
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Doubt: The 4th article eventually passes the string "object" instead of the original object obj. Just the type of obj. Does not achieve the effect of passing objects.
You can test the code: the ID of the object that pops up

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<body>
<div id= "sssss" ></div>
</body> ;
<script language= "JavaScript" >
Obj=document.getelementbyid (' sssss ');
function Test (obj)
{
alert (obj.id);
settimeout ("" Test (' + obj + ') ", 1000);
}
Test (obj)
</script>