CD-320 Part VI . Appendixes Listing 16-43 (continued)

onBeforeUnload Event Handler

Use this button to navigate to the previous page: Go Back onHelp NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example The following script fragment can be embedded in the IE5-only modeless dialog box code in Listing 16-44 to provide context-sensitive help within the dialog box. Help messages for only two of the form elements are shown here, but in a real application you add messages for the rest. function showHelp() { switch (event.srcElement.name) { case bgColor : alert( Choose a color for the main window s background. ) break case name : alert( Enter your first name for a friendly greeting. ) break default : alert( Make preference settings for the main page styles. ) } windowObject.onHelp
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