JavaScript Examples Bible - UserWorks Technologies

188
JavaScript Examples Bible: The Essential Companion to JavaScript Bible
Event handlers
onAfterPrint
onBeforePrint
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓
Example
The following script fragment assumes that the page includes a DIV element
whose style sheet includes a setting of display:none as the page loads.
Somewhere in the Head, the print-related event handlers are set as properties:
function showPrintCopyright() {
document.all.printCopyright.style.display = “block”
}
function hidePrintCopyright() {
document.all.printCopyright.style.display = “none”
}
window.onbeforeprint = showPrintCopyright
window.onafterprint = hidePrintCopyright
onBeforeUnload
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓ ✓
Example
The simple page in Listing 16-43 shows you how to give the user a chance to stay
on the page.
Listing 16-43: Using the onBeforeUnload Event Handler
onBeforeUnload Event Handler
function verifyClose() {
event.returnValue = “We really like you and hope you will stay longer.”
}
windowObject.onBeforeUnload