On the _javascript skills of JavaScript grammar and timing function

First, JavaScript basic syntax.

(i) Data type and variable type. Integer, Decimal, Layout, string, date time, array cast: parseint () parsefloat () isNaN ()

(ii) array var array name = new Array ([length]); "Counterfeit" array a.length-length a[subscript] = value. a[Subscript]

(iii) function

Copy Code code as follows:

function functions name (formal parameter)
{
}
function Showstr (a)
{
}

Second, Dom operation
Dom-document object Model Document objects. Tree
Linear model, tree-like model, mesh model
Window
History
Location
Document

Head
Body
A,img,table,ul,ol .....
Status

The verb of noun behavior--object characteristic of object

(i) window 1.alert () Window.alert ();

2.[var a =]window.confirm ("Can you run through the leopard?") Where to ask "); Prompt (); --not used, don't remember, enter

3.open (); Open ("Address", "_blank/_self", "features of the new Window"); [var a =]window.open ("http://jb51.net"); Open the page in a new window and return to the new window. A is also a variable of type window. Detailed translation is required.

4.close (); Window.close ();

5.setTimeout ("code", number of milliseconds) after the specified number of milliseconds, execute the code once.

Example

<script language= "javascript" >

function showTime ()
{
var date = new Date ();
document.getElementById ("hh"). InnerHTML = date;
Window.settimeout ("ShowTime ()", 1000);

}
Window.settimeout ("ShowTime ()", 1000);
</script>

Practice
Do a page in 5 seconds after the first page of the question

<script language= "JavaScript" >

var A;
function Openad ()
{
a = window.open ("http://hovertree.com", "_blank", "width=200" height=200 toolbar=no top=0 Left=0 ");

Window.settimeout ("Closead ()", 5000);
}
function Closead ()
{
a.close ();
}
Window.settimeout ("Openad ()", 5000);

</script>

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