Javascript Basics Part 7 -1

function newO()
    {
      window.open("Default.aspx?name='rtyt'",'');
    }

function requestString(val)
{
var q= unescape(location.search.substr(1)).split('&');//frist split

for(var i=0;i<q.length;i++)
{
    var t= q[i].split('=');//second split

    if(t[0].toLowerCase()==val.toLowerCase()) alert(t[1]);
}

}
<body onload="requestString('name')">

var newWindow=window.open('', 'TestWindow', 'width=200,height=200');
newWindow.document.write('This window will close in 2 seconds');
setTimeout(function(){ newWindow.close(); }, 2000);

setTimeout will execute your code one time after the time has elapsed. setInterval will continue to execute your code after each interval. Set to 5,000, setInterval would execute your code every 5 seconds.

There are two other functions, clearTimeout and clearInterval that cancel Timeouts or Intervals you have set. In order to do this, however, you need to have a reference to the setTimeout or setInterval call, i.e:

var myTimeout = setTimeout("alert('Hi!');", 500);
clearTimeout(myTimeout);

If you did not save the reference, the myTimeout variable, there is no way to clear the Timeout or Interval. Now let's take a look at an example of this in action: function createTimeout(text, time){
    setTimeout("alert('"+text+"');", time);
}
var intervals = [];
function createInterval(text, time){
    // store the interval in intervals array
    intervals.push(setInterval("alert('"+text+"');", time));
}
function tut5(){
    if(intervals.length==0) return;
    // clear the last interval in intervals array
    clearInterval(intervals.pop());
}
document.write('The URL of the parent window is: '+window.opener.location);
You have already seen various properties of the document object being used. document.forms, for instance, returns an array of all forms on the page. There are several properties similiar to this: 
Property Description Property.length value on this page
document.forms An array containing all the forms on the current page 3
document.images An array containing all the images on the current page 27
document.links An array containing all the links on the current page 81
document.anchors An array containing all the anchors on the current page 0
document.applets An array containing all the applets on the current page 2
document.styleSheets An array containing all the stylesheets on the current page 4
window.frames An array containing all the frames on the current page 1

posted on 2006-12-06 10:30 javaca88 阅读(188) 评论(0) 收藏举报

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Property	Description	Property.length value on this page
document.forms	An array containing all the forms on the current page	3
document.images	An array containing all the images on the current page	27
document.links	An array containing all the links on the current page	81
document.anchors	An array containing all the anchors on the current page	0
document.applets	An array containing all the applets on the current page	2
document.styleSheets	An array containing all the stylesheets on the current page	4
window.frames	An array containing all the frames on the current page	1