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onbeforeprint Event


Fires on the object before its associated document prints.

Syntax

Inline HTML <ELEMENT onbeforeprint = "handler" ... > All platforms
Event property object.onbeforeprint = handler JScript (compatible with ECMA 262 language specification) only
Named script <SCRIPT FOR = object EVENT = onbeforeprint> Internet Explorer only

Remarks

Bubbles No
Cancels No
To invoke
  • Choose Print from the File menu in Internet Explorer.
  • Press CTRL + P.
  • Right-click anywhere on a page, and choose Print.
  • Right-click on a link on a page, and choose Print.
  • From Windows Explorer, select an .htm file and choose Print from the File menu.
  • From Windows Explorer, right-click on an .htm file and choose Print.
Default action Prints the document associated with the object for which the event is specified.

Use this event to modify the document just before it prints. In most cases it is used to make all the information on the page visible just before printing.

Use the event in conjunction with the onafterprint event to undo the changes made to the document in the onbeforeprint event.

Event Object Properties

Although event handlers in the document object model do not receive parameters directly, the handler can query the event object for data.

Event Object Properties

altKeyRetrieves the current state of the ALT key.
buttonRetrieves which mouse button, if any, is pressed.
cancelBubbleSets or retrieves whether the current event should bubble up the hierarchy of event handlers.
clientXRetrieves the x-coordinate of the mouse cursor relative to the client area of the window, excluding window decorations or scroll bars.
clientYRetrieves the y-coordinate of the mouse cursor relative to the client area of the window, excluding window decorations or scroll bars.
ctrlKeyRetrieves the state of the CTRL key.
returnValueSets or retrieves the return value from the event.
screenXRetrieves the horizontal position of the mouse, in pixels, relative to the user's screen.
screenYRetrieves the vertical position of the mouse, in pixels, relative to the user's screen.
shiftKeyRetrieves the state of the SHIFT key.
srcElementRetrieves the object that fired the event.
typeRetrieves the event name from the event object.
xRetrieves the x-coordinate of the mouse cursor relative to the parent element.
yRetrieves the y-coordinate of the mouse cursor relative to the parent element.

Example

This example uses the onbeforeprint to make all hidden sections of the page visible just before the page prints. The onafterprint event is processed after the page prints to return the document to its original state.

Sample Code

function window.onbeforeprint()
{
    // Walk through all the elements in the document with
    // CLASS="collapsed" and set it to "expanded" just for printing.
   var coll = document.all.tags("DIV");
   if (coll!=null)
   {
      for (i=0; i<coll.length; i++) 
     if (coll[i].className == "collapsed")
 {  
           coll[i].className = "expanded";
   
        // After printing, make sure to set CLASS="collapsed" 
        // only for those that were expanded just for printing.
   coll[i].bExpandedForPrinting = true;
 }

 else if (coll[i].className == "expanded")
    coll[i].bExpandedForPrinting = false;
   }
}

function window.onafterprint()
{
   // Walk through all the elements in the doc with CLASS="expanded"
   // and set it to "collapsed" if expanded just for 
   // printing.
   var coll = document.all.tags("DIV");
   if (coll!=null)
   {
      for (i=0; i < coll.length; i++) 
     if ((coll[i].className == "expanded") &&
     (coll[i].bExpandedForPrinting))
 {  
           coll[i].className = "collapsed";
   coll[i].bExpandedForPrinting = false;
 }
   }
}
This feature requires Microsoft® Internet Explorer 5 or later. Click the icon below to install the latest version. Then reload this page to view the sample.
Microsoft Internet Explorer

Applies To

[ Object Name ]
PlatformVersion
Win16:
Win32:
Mac:
Unix:
WinCE:
window, BODY, FRAMESET

See Also

onafterprint, print



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