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1.阻止冒泡。
function stopPropagation(event){ event = event || getEvent(event); if(event.stopPropagation){ event.stopPropagation(); }else{ event.cancelBubble = true; } } Lily[‘event‘] = stopPropagation;
2.阻止事件默认动作。
function preventDefault(event){ event = event || getEvent(event); if(event.preventDefault){ event.preventDefault(); }else{ event.returnValue = false; } } Lily[‘preventDefault‘] = preventDefault;
3.在文档加载完时执行函数，不用等待图片都加载完。
function addLoadEvent(loadEvent, waitForImages){ if(!isCompatible()) return false; if(waitForImages){ addEvent(window, ‘load‘, loadEvent); } var init = function (){ if(arguments.callee.done) return; arguments.callee.done = true; loadEvent.apply(document, arguments); }; if(document.addEventListener){ document.addEventListener("DomContentLoaded", init, false); } if(/WebKit/i.test(navigator.userAgent)){ var timer = setInterval(function (){ if(/complete|loaded/.test(document.readyState)){ clearInteval(timer); init(); } }, 10); } /*@cc_on @*/ /*@if (@_win32) document.write("<src id=__ie_loaded defer src=//:><\/script>"); var script = document.getElementById("__ie_loaded"); script.onreadystatechange = function (){ if(this.readyState == "complete"){ this.onreadystatechange = null; init(); } }; /*@end @*/ return true; } Lily[‘addLoadEvent‘] = addLoadEvent;
4.取得target对象。
function getTarget(event){ event = event || getEvent(event); var target = event.target || event.srcElement; if(target.nodeType == Lily.node.TEXT_NODE){ target = target.parentNode; } return target; } Lily[‘getTarget‘] = getTarget;
5.判断鼠标哪个键被按下。
function getMouseButton(event){ event = event || getEvent(event); var buttons = { ‘left‘ : false, ‘middle‘ : false, ‘right‘ : false }; if(event.toString && event.toString().indexOf(‘MouseEvent‘) != -1){ switch(event.button){ case 0: buttons.left = true; break; case 1: buttons.middle = true; break; case 2: buttons.right = true; break; default: break; } }else if(event.button){ switch(event.button){ case 1: buttons.left = true; break; case 2: buttons.right = true; break; case 3: buttons.left = true; buttons.right = true; break; case 4: buttons.middle = true; break; case 5: buttons.left = true; buttons.middle = true; break; case 6: buttons.middle = true; buttons.right = true; break; case 7: buttons.left = true; buttons.middle = true; buttons.right = true; break; default: break; } }else{ return false; } return buttons; } Lily[‘getMouseButton‘] = getMouseButton;
6.获取鼠标在文档中的位置。
function getPositionInDocument(event){ event = event || getEvent(event); var x = event.pageX || (event.clientX + document.documentElement.scrollLeft) || (event.clientX + document.body.scrollLeft); var y = event.pageY || (event.clientY + document.documentElement.scrollTop) || (event.clientY + document.body.scrollTop); return {‘x‘ : x, ‘y‘ : y}; } Lily[‘getPositionInDocument‘] = getPositionInDocument;
7.获取按键的值。
function getKeyPressed(event){ event = event || getEvent(event); var code = event.keyCode; var value = String.fromCharCode(code); return {‘code‘: code, ‘value‘: value}; } Lily[‘getKeyPressed‘] = getKeyPressed;
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原文地址：http://www.cnblogs.com/pandabunny/p/4771965.html
