event.js

这是一个ajax的例子大家好好的看看就是一个鱼眼的效果

					}
				}
			},
			_normalizeEventName: function(/*String*/eventName){
				// Generally, eventName should be lower case, unless it is
				// special somehow (e.g. a Mozilla event)
				// ensure 'on'
				return eventName.slice(0,2) != "on" ? "on" + eventName : eventName;
			},
			_nop: function(){},
			_fixEvent: function(/*Event*/evt, /*DOMNode*/sender){
				// summary:
				//		normalizes properties on the event object including event
				//		bubbling methods, keystroke normalization, and x/y positions
				// evt: native event object
				// sender: node to treat as "currentTarget"
				if(!evt){
					var w = sender && (sender.ownerDocument || sender.document || sender).parentWindow || window;
					evt = w.event; 
				}
				if(!evt){return(evt);}
				evt.target = evt.srcElement; 
				evt.currentTarget = (sender || evt.srcElement); 
				evt.layerX = evt.offsetX;
				evt.layerY = evt.offsetY;
				// FIXME: scroll position query is duped from dojo.html to
				// avoid dependency on that entire module. Now that HTML is in
				// Base, we should convert back to something similar there.
				var se = evt.srcElement, doc = (se && se.ownerDocument) || document;
				// DO NOT replace the following to use dojo.body(), in IE, document.documentElement should be used
				// here rather than document.body
				var docBody = ((dojo.isIE < 6) || (doc["compatMode"] == "BackCompat")) ? doc.body : doc.documentElement;
				var offset = dojo._getIeDocumentElementOffset();
				evt.pageX = evt.clientX + dojo._fixIeBiDiScrollLeft(docBody.scrollLeft || 0) - offset.x;
				evt.pageY = evt.clientY + (docBody.scrollTop || 0) - offset.y;
				if(evt.type == "mouseover"){ 
					evt.relatedTarget = evt.fromElement;
				}
				if(evt.type == "mouseout"){ 
					evt.relatedTarget = evt.toElement;
				}
				evt.stopPropagation = del._stopPropagation;
				evt.preventDefault = del._preventDefault;
				return del._fixKeys(evt);
			},
			_fixKeys: function(evt){
				switch(evt.type){
					case "keypress":
						var c = ("charCode" in evt ? evt.charCode : evt.keyCode);
						if (c==10){
							// CTRL-ENTER is CTRL-ASCII(10) on IE, but CTRL-ENTER on Mozilla
							c=0;
							evt.keyCode = 13;
						}else if(c==13||c==27){
							c=0; // Mozilla considers ENTER and ESC non-printable
						}else if(c==3){
							c=99; // Mozilla maps CTRL-BREAK to CTRL-c
						}
						// Mozilla sets keyCode to 0 when there is a charCode
						// but that stops the event on IE.
						evt.charCode = c;
						del._setKeyChar(evt);
						break;
				}
				return evt;
			},
			// some ctrl-key combinations (mostly w/punctuation) do not emit a char code in IE
			// we map those virtual key codes to ascii here
			// not valid for all (non-US) keyboards, so maybe we shouldn't bother
			_punctMap: { 
				106:42, 
				111:47, 
				186:59, 
				187:43, 
				188:44, 
				189:45, 
				190:46, 
				191:47, 
				192:96, 
				219:91, 
				220:92, 
				221:93, 
				222:39 
			},
			_stealthKeyDown: function(evt){
				// IE doesn't fire keypress for most non-printable characters.
				// other browsers do, we simulate it here.
				var kp = evt.currentTarget.onkeypress;
				// only works if kp exists and is a dispatcher
				if(!kp || !kp._listeners){ return; }
				// munge key/charCode
				var k=evt.keyCode;
				// These are Windows Virtual Key Codes
				// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/WinUI/WindowsUserInterface/UserInput/VirtualKeyCodes.asp
				var unprintable = (k!=13)&&(k!=32)&&(k!=27)&&(k<48||k>90)&&(k<96||k>111)&&(k<186||k>192)&&(k<219||k>222);
				// synthesize keypress for most unprintables and CTRL-keys
				if(unprintable||evt.ctrlKey){
					var c = unprintable ? 0 : k;
					if(evt.ctrlKey){
						if(k==3 || k==13){
							return; // IE will post CTRL-BREAK, CTRL-ENTER as keypress natively 
						}else if(c>95 && c<106){ 
							c -= 48; // map CTRL-[numpad 0-9] to ASCII
						}else if((!evt.shiftKey)&&(c>=65&&c<=90)){ 
							c += 32; // map CTRL-[A-Z] to lowercase
						}else{ 
							c = del._punctMap[c] || c; // map other problematic CTRL combinations to ASCII
						}
					}
					// simulate a keypress event
					var faux = del._synthesizeEvent(evt, {type: 'keypress', faux: true, charCode: c});
					kp.call(evt.currentTarget, faux);
					evt.cancelBubble = faux.cancelBubble;
					evt.returnValue = faux.returnValue;
					_trySetKeyCode(evt, faux.keyCode);
				}
			},
			// Called in Event scope
			_stopPropagation: function(){
				this.cancelBubble = true; 
			},
			_preventDefault: function(){
				// Setting keyCode to 0 is the only way to prevent certain keypresses (namely
				// ctrl-combinations that correspond to menu accelerator keys).
				// Otoh, it prevents upstream listeners from getting this information
				// Try to split the difference here by clobbering keyCode only for ctrl 
				// combinations. If you still need to access the key upstream, bubbledKeyCode is
				// provided as a workaround.
				this.bubbledKeyCode = this.keyCode;
				if(this.ctrlKey){_trySetKeyCode(this, 0);}
				this.returnValue = false;
			}
		});
				
		// override stopEvent for IE
		dojo.stopEvent = function(evt){
			evt = evt || window.event;
			del._stopPropagation.call(evt);
			del._preventDefault.call(evt);
		}
	}

	del._synthesizeEvent = function(evt, props){
			var faux = dojo.mixin({}, evt, props);
			del._setKeyChar(faux);
			// FIXME: would prefer to use dojo.hitch: dojo.hitch(evt, evt.preventDefault); 
			// but it throws an error when preventDefault is invoked on Safari
			// does Event.preventDefault not support "apply" on Safari?
			faux.preventDefault = function(){ evt.preventDefault(); }; 
			faux.stopPropagation = function(){ evt.stopPropagation(); }; 
			return faux;
	}
	
	// Opera event normalization
	if(dojo.isOpera){
		dojo.mixin(del, {
			_fixEvent: function(evt, sender){
				switch(evt.type){
					case "keypress":
						var c = evt.which;
						if(c==3){
							c=99; // Mozilla maps CTRL-BREAK to CTRL-c
						}
						// can't trap some keys at all, like INSERT and DELETE
						// there is no differentiating info between DELETE and ".", or INSERT and "-"
						c = ((c<41)&&(!evt.shiftKey) ? 0 : c);
						if((evt.ctrlKey)&&(!evt.shiftKey)&&(c>=65)&&(c<=90)){
							// lowercase CTRL-[A-Z] keys
							c += 32;
						}
						return del._synthesizeEvent(evt, { charCode: c });
				}
				return evt;
			}
		});
	}

	// Safari event normalization
	if(dojo.isSafari){
		dojo.mixin(del, {
			_fixEvent: function(evt, sender){
				switch(evt.type){
					case "keypress":
						var c = evt.charCode, s = evt.shiftKey, k = evt.keyCode;
						// FIXME: This is a hack, suggest we rethink keyboard strategy.
						// Arrow and page keys have 0 "keyCode" in keypress events.on Safari for Windows
						k = k || identifierMap[evt.keyIdentifier] || 0;
						if(evt.keyIdentifier=="Enter"){
							c = 0; // differentiate Enter from CTRL-m (both code 13)
						}else if((evt.ctrlKey)&&(c>0)&&(c<27)){
							c += 96; // map CTRL-[A-Z] codes to ASCII
						} else if (c==dojo.keys.SHIFT_TAB) {
							c = dojo.keys.TAB; // morph SHIFT_TAB into TAB + shiftKey: true
							s = true;
						} else {
							c = (c>=32 && c<63232 ? c : 0); // avoid generating keyChar for non-printables
						}
						return del._synthesizeEvent(evt, {charCode: c, shiftKey: s, keyCode: k});
				}
				return evt;
			}
		});
		
		dojo.mixin(dojo.keys, {
			SHIFT_TAB: 25,
			UP_ARROW: 63232,
			DOWN_ARROW: 63233,
			LEFT_ARROW: 63234,
			RIGHT_ARROW: 63235,
			F1: 63236,
			F2: 63237,
			F3: 63238,
			F4: 63239,
			F5: 63240,
			F6: 63241,
			F7: 63242,
			F8: 63243,
			F9: 63244,
			F10: 63245,
			F11: 63246,
			F12: 63247,
			PAUSE: 63250,
			DELETE: 63272,
			HOME: 63273,
			END: 63275,
			PAGE_UP: 63276,
			PAGE_DOWN: 63277,
			INSERT: 63302,
			PRINT_SCREEN: 63248,
			SCROLL_LOCK: 63249,
			NUM_LOCK: 63289
		});
		var dk = dojo.keys, identifierMap = { "Up": dk.UP_ARROW, "Down": dk.DOWN_ARROW, "Left": dk.LEFT_ARROW, "Right": dk.RIGHT_ARROW, "PageUp": dk.PAGE_UP, "PageDown": dk.PAGE_DOWN }; 
	}
})();

if(dojo.isIE){
	// keep this out of the closure
	// closing over 'iel' or 'ieh' b0rks leak prevention
	// ls[i] is an index into the master handler array
	dojo._ieDispatcher = function(args, sender){
		var ap=Array.prototype, h=dojo._ie_listener.handlers, c=args.callee, ls=c._listeners, t=h[c.target];
		// return value comes from original target function
		var r = t && t.apply(sender, args);
		// invoke listeners after target function
		for(var i in ls){
			if(!(i in ap)){
				h[ls[i]].apply(sender, args);
			}
		}
		return r;
	}
	dojo._getIeDispatcher = function(){
		// ensure the returned function closes over nothing
		return new Function(dojo._scopeName + "._ieDispatcher(arguments, this)"); // function
	}
	// keep this out of the closure to reduce RAM allocation
	dojo._event_listener._fixCallback = function(fp){
		var f = dojo._event_listener._fixEvent;
		return function(e){ return fp.call(this, f(e, this)); };
	}
}

}