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Working With Popup Windows in JavaScript

Discussion in 'JavaScript and AJAX' started by pradeep, Jun 25, 2012.

  1. pradeep

    pradeep Team Leader

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    JavaScript is widely used for client side scripting ranging from simple effects to creating a rich UI like GMail. A significant operation with the client browser involves working with the browser window, like scrolling, resizing popup window, detecting window resize by the user, opening new window, closing a window etc.

    In this article we'll look at the some operations which can be done with browser windows using JavaScript.

    Opening a New Popup Window



    Here is the syntax:

    Code:
    window.open('<url>','<window_name>','<options>');
    
    The options may include the height & width of the new window, whether to show various toolbars like address bar, status bar etc. Follow the sample code below:

    HTML:
    <html>
    <head>
    <script type="text/javascript">
    function open_new_window() {
       var new_window =  window.open("http://www.go4expert.com","g4e_win","status=1,toolbar=0,location=0,menubar=0,height=200,width=300");
    }
    </script>
    </head>
    <body>
    <form>
    <input type="button" value="Open new window" onClick="open_new_window()">
    </form>
    </body>
    </html>
    

    Closing a Popup Window



    Closing a window is very straight forward, the window object has a method which does this for us.

    HTML:
    <html>
    <head>
    <script type="text/javascript">
    function close_window() {
       if(window.confirm('Do you want to close this window?')) {
          window.close();
       }
    }
    </script>
    </head>
    <body>
    <form>
    <input type="button" value="Close this window" onClick="close_window()">
    </form>
    </body>
    </html>
    

    Resizing a Popup Window



    You can resize windows programatically, in JavaScript there are two methods window.resizeBy(delta_w,delta_h) and window.resizeTo(w,h), the former resizes by a specified difference from the current size and the later just re-sizes to the absolute size provided. The following sample code will help you understand.

    HTML:
    <html>
    <head>
    <script type="text/javascript">
    function resize_by() {
        window.resizeBy(50,50);
    }
    
    function resize_to() {
        window.resizeTo(100,400);
    }
    
    </script>
    </head>
    <body>
    <form>
    <input type="button" value="Resize by a 50x50"  onClick="resize_by()"> <input type="button" value="Resize to  100x400" onClick="resize_to()">
    
    </form>
    </body>
    </html>
    

    Scrolling inside a Popup Window



    For scrolling windows programatically JavaScript offers two methods namely window.scroll(x,y) and window.scrollBy(x,y), the first one accepts the absolute positions (horizontal & vertical) of the positions to scroll to, and the second method will scroll by the specified amount from the current scroller position. See the sample code below.

    HTML:
    <html>
    <head>
    <script type="text/javascript">
    function scroll_by() {
        window.scrollBy(0,5);
    }
    
    function scroll_to() {
        window.scroll(0,40);
    }
    
    </script>
    </head>
    <body>
    <form>
    <input type="button" value="Scroll by a bit"  onClick="scroll_by()"> <input type="button" value="Scroll to 0,40"  onClick="scroll_to()">
    
    </form>
    <div id="dummy">
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    Scroll<br/><br/><br/><br/>
    </div>
    </body>
    </html>
    

    Print The Current Document



    You can programmatically invoke the browser's print function using the window.print() method. It'll open up the browser's print dialog.

    HTML:
    <html>
    <head><title>Print</title>
    </head>
    <body>
    <form>
    <input type="button" value="Print" onClick="window.print()"> 
    </form>
    </body>
    </html>
    
     
  2. unni krishnan.r

    unni krishnan.r New Member

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