Mega Code Archive
NN4 Capture, Release, and Route Events
<![CDATA[
/*
JavaScript Bible, Fourth Edition
by Danny Goodman
John Wiley & Sons CopyRight 2001
*/
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
function setDocCapture(enable) {
if (!enable) {
document.captureEvents(Event.CLICK)
} else {
document.releaseEvents(Event.CLICK)
document.forms[0].setDocRte.checked = false
docRoute = false
}
}
function setLayerCapture(enable) {
if (!enable) {
document.layer1.captureEvents(Event.CLICK)
} else {
document.layer1.releaseEvents(Event.CLICK)
document.forms[0].setLyrRte.checked = false
layerRoute = false
}
}
var docRoute = false
var layerRoute = false
function setDocRoute(enable) {
docRoute = !enable
}
function setLayerRoute(enable) {
layerRoute = !enable
}
function doMainClick(e) {
if (e.target.type == "button") {
alert("Captured in top document")
if (docRoute) {
routeEvent(e)
}
}
}
document.captureEvents(Event.CLICK)
document.onclick=doMainClick
</SCRIPT>
</HEAD>
<BODY>
<B>Capture, Release, and Routing of Event.CLICK</B>
<HR>
<FORM>
<INPUT TYPE="checkbox" NAME="setDocCap"
onMouseDown="setDocCapture(this.checked)" CHECKED>Enable Document Capture
<INPUT TYPE="checkbox" NAME="setDocRte"
onMouseDown ="setDocRoute(this.checked)">And let event continue<P>
<INPUT TYPE="checkbox" NAME="setLyrCap"
onMouseDown ="setLayerCapture(this.checked)" CHECKED>Enable Layer Capture
<INPUT TYPE="checkbox" NAME="setLyrRte"
onMouseDown ="setLayerRoute(this.checked)">And let event continue
<HR>
<INPUT TYPE="button" VALUE="Button 'main1'" NAME="main1"
onClick="alert('Event finally reached Button:' + this.name)">
</FORM>
<LAYER ID="layer1" LEFT=200 TOP=150 BGCOLOR="coral">
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
function doLayerClick(e) {
if (e.target.type == "button") {
alert("Captured in layer1")
if (layerRoute) {
routeEvent(e)
}
}
}
layer1.captureEvents(Event.CLICK)
layer1.onclick=doLayerClick
</SCRIPT>
</HEAD>
<BODY>
<FORM>
layer1<BR><P><INPUT TYPE="button" VALUE="Button 'layerButton1'"
NAME="layerButton1"
onClick="alert('Event finally reached Button:' + this.name)"></P>
<P><INPUT TYPE="button" VALUE="Button 'layerButton2'"
NAME="layerButton2"
onClick="alert('Event finally reached Button:' + this.name)"></P>
</FORM>
</BODY>
</LAYER>
</BODY>
</HTML>
]]>