Javascrip中Event 的总结
1 用 Javascript 实现了一个自定义的右键弹出菜单。鼠标点击事件的获取和计算是比较难点的事情。一般以为考虑兼容性(如 IE 5/6,FF),实际上还要考虑 HTML 文件在文件头的定义。而且,Event 事件和 Document 对象在 IE 和 NS 下又有各自不同的定义和用法。在这里总结一下,希望对其他朋友有个帮助。
2
3 下面是“无定义 HTML 的 Event 事件”的测试代码,存为 Event1.html,分别用 IE 和 Firefox 打开,点击页面就可看到结果。
4 下面是详细代码:
5
6 <html>
7 <head>
8 <meta http-equiv="Content-Type" c>
9 <title>无定义 HTML 的 Event 事件</title>
10 <script language="javascript">
11 function getvalue(e){
12 if (!document.all){
13 winW = window.innerWidth;
14 winH = window.innerHeight;
15 curX = e.pageX - window.pageXOffset;
16 curY = e.pageY - window.pageYOffset;
17 mouX = e.pageX;
18 mouY = e.pageY;
19 broX = window.pageXOffset;
20 broY = window.pageYOffset;
21 }else{
22 winW = document.body.clientWidth;
23 winH = document.body.clientHeight;
24 curX = event.clientX;
25 curY = event.clientY;
26 mouX = event.clientX + document.body.scrollLeft;
27 mouY = event.clientY + document.body.scrollTop;
28 broX = document.body.scrollLeft;
29 broY = document.body.scrollTop;
30 }
31 alert(" 窗口可见宽度(winW): "+winW+""n"n 窗口可见高度(winH): "+winH+""n"n 距窗口左边距离(curX): "+curX+""n"n 距窗口顶部距离(curY): "+curY+""n"n 距页面左边距离(mouX): "+mouX+""n"n 距页面顶部距离(mouY): "+mouY+""n"n 页面滚动的宽度(broX): "+broX+""n"n 页面滚动的高度(broY): "+broY);
32 return true;
33 }
34 document.onclick=getvalue;
35 </script>
36 </head>
37
38 <body>
39 <img src="" width="400" height="500">
40 </body>
41 </html>
42
43 下面是“定义了 HTML's DOCTYPE 的 Event 事件”的测试代码,存为 Event2.html,分别用 IE 和 Firefox 打开,点击页面就可看到结果;很显然,document.body 变成了 document.documentElement。
44 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
45 <html xmlns="http://www.w3.org/1999/xhtml">
46 <head>
47 <meta http-equiv="Content-Type" c />
48 <title>定义了 HTML's DOCTYPE 的 Event 事件</title>
49 <script language="JavaScript" type="text/javascript">
50 function getvalue(e){
51 if (!document.all){
52 winW = window.innerWidth;
53 winH = window.innerHeight;
54 curX = e.pageX - window.pageXOffset;
55 curY = e.pageY - window.pageYOffset;
56 mouX = e.pageX;
57 mouY = e.pageY;
58 broX = window.pageXOffset;
59 broY = window.pageYOffset;
60 }else{
61 winW = document.documentElement.clientWidth;
62 winH = document.documentElement.clientHeight;
63 curX = event.clientX;
64 curY = event.clientY;
65 mouX = event.clientX + document.documentElement.scrollLeft;
66 mouY = event.clientY + document.documentElement.scrollTop;
67 broX = document.documentElement.scrollLeft;
68 broY = document.documentElement.scrollTop;
69 }
70 alert(" 窗口可见宽度(winW): "+winW+""n"n 窗口可见高度(winH): "+winH+""n"n 距窗口左边距离(curX): "+curX+""n"n 距窗口顶部距离(curY): "+curY+""n"n 距页面左边距离(mouX): "+mouX+""n"n 距页面顶部距离(mouY): "+mouY+""n"n 页面滚动的宽度(broX): "+broX+""n"n 页面滚动的高度(broY): "+broY);
71 return true;
72 }
73 document.onclick=getvalue;
74 </script>
75 </head>
76
77 <body>
78 <img src="" width="400" height="500" alt="" />
79 </body>
80 </html>
81
82 本文写的很不错,顺手转载过来,希望大家喜欢。
83
2
3 下面是“无定义 HTML 的 Event 事件”的测试代码,存为 Event1.html,分别用 IE 和 Firefox 打开,点击页面就可看到结果。
4 下面是详细代码:
5
6 <html>
7 <head>
8 <meta http-equiv="Content-Type" c>
9 <title>无定义 HTML 的 Event 事件</title>
10 <script language="javascript">
11 function getvalue(e){
12 if (!document.all){
13 winW = window.innerWidth;
14 winH = window.innerHeight;
15 curX = e.pageX - window.pageXOffset;
16 curY = e.pageY - window.pageYOffset;
17 mouX = e.pageX;
18 mouY = e.pageY;
19 broX = window.pageXOffset;
20 broY = window.pageYOffset;
21 }else{
22 winW = document.body.clientWidth;
23 winH = document.body.clientHeight;
24 curX = event.clientX;
25 curY = event.clientY;
26 mouX = event.clientX + document.body.scrollLeft;
27 mouY = event.clientY + document.body.scrollTop;
28 broX = document.body.scrollLeft;
29 broY = document.body.scrollTop;
30 }
31 alert(" 窗口可见宽度(winW): "+winW+""n"n 窗口可见高度(winH): "+winH+""n"n 距窗口左边距离(curX): "+curX+""n"n 距窗口顶部距离(curY): "+curY+""n"n 距页面左边距离(mouX): "+mouX+""n"n 距页面顶部距离(mouY): "+mouY+""n"n 页面滚动的宽度(broX): "+broX+""n"n 页面滚动的高度(broY): "+broY);
32 return true;
33 }
34 document.onclick=getvalue;
35 </script>
36 </head>
37
38 <body>
39 <img src="" width="400" height="500">
40 </body>
41 </html>
42
43 下面是“定义了 HTML's DOCTYPE 的 Event 事件”的测试代码,存为 Event2.html,分别用 IE 和 Firefox 打开,点击页面就可看到结果;很显然,document.body 变成了 document.documentElement。
44 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
45 <html xmlns="http://www.w3.org/1999/xhtml">
46 <head>
47 <meta http-equiv="Content-Type" c />
48 <title>定义了 HTML's DOCTYPE 的 Event 事件</title>
49 <script language="JavaScript" type="text/javascript">
50 function getvalue(e){
51 if (!document.all){
52 winW = window.innerWidth;
53 winH = window.innerHeight;
54 curX = e.pageX - window.pageXOffset;
55 curY = e.pageY - window.pageYOffset;
56 mouX = e.pageX;
57 mouY = e.pageY;
58 broX = window.pageXOffset;
59 broY = window.pageYOffset;
60 }else{
61 winW = document.documentElement.clientWidth;
62 winH = document.documentElement.clientHeight;
63 curX = event.clientX;
64 curY = event.clientY;
65 mouX = event.clientX + document.documentElement.scrollLeft;
66 mouY = event.clientY + document.documentElement.scrollTop;
67 broX = document.documentElement.scrollLeft;
68 broY = document.documentElement.scrollTop;
69 }
70 alert(" 窗口可见宽度(winW): "+winW+""n"n 窗口可见高度(winH): "+winH+""n"n 距窗口左边距离(curX): "+curX+""n"n 距窗口顶部距离(curY): "+curY+""n"n 距页面左边距离(mouX): "+mouX+""n"n 距页面顶部距离(mouY): "+mouY+""n"n 页面滚动的宽度(broX): "+broX+""n"n 页面滚动的高度(broY): "+broY);
71 return true;
72 }
73 document.onclick=getvalue;
74 </script>
75 </head>
76
77 <body>
78 <img src="" width="400" height="500" alt="" />
79 </body>
80 </html>
81
82 本文写的很不错,顺手转载过来,希望大家喜欢。
83