js鼠标事件、键盘事件实例代码
讲述了:鼠标的哪个按键被点击、当前鼠标的光标坐标是多少、被按下键的unicode码是多少、当前鼠标的光标相对于屏幕的坐标是多少、当前鼠标的光标坐标是多少、shift键是否按下、当前被点击的是哪一个元素
1. 鼠标的哪个按键被点击?
<html> <head> <script type="text/javascript"> function whichButton(event) { if (event.button==2) { alert("你点击了鼠标右键!") } else { alert("你点击了鼠标左键!") } } </script> </head> <body onmousedown="whichButton(event)"> <p>请单击你鼠标的左键或右键试试</p> </body> </html>
2. 当前鼠标的光标坐标是多少?
<html> <head> <script type="text/javascript"> function show_coords(event) { x=event.clientX y=event.clientY alert("X 坐标: " + x + ", Y 坐标: " + y) } </script> </head> <body onmousedown="show_coords(event)"> <p>在此文档中按下你鼠标的左键看看!</p> </body> </html>
3. 被按下键的unicode码是多少?
<html> <head> <script type="text/javascript"> function whichButton(event) { alert(event.keyCode) } </script> </head> <body onkeyup="whichButton(event)"> <p>在此文档中按下你键盘上的某个键看看</p> </body> </html>
4. 当前鼠标的光标相对于屏幕的坐标是多少?
<html> <head> <script type="text/javascript"> function coordinates(event) { x=event.screenX y=event.screenY alert("X=" + x + " Y=" + y) } </script> </head> <body onmousedown="coordinates(event)"> <p> 点击你鼠标的左键 </p> </body> </html>
5. 当前鼠标的光标坐标是多少?
<html> <head> <script type="text/javascript"> function coordinates(event) { x=event.x y=event.y alert("X=" + x + " Y=" + y) } </script> </head> <body onmousedown="coordinates(event)"> <p> 点击你鼠标的左键 </p> </body> </html>
6. shift键是否按下?
<html> <head> <script type="text/javascript"> function isKeyPressed(event) { if (event.shiftKey==1) { alert("shit键按下了!") } else { alert("shit键没有按下!") } } </script> </head> <body onmousedown="isKeyPressed(event)"> <p>按下shit键,点击你鼠标的左键</p> </body> </html>
7. 当前被点击的是哪一个元素?
<html> <head> <script type="text/javascript"> function whichElement(e) { var targ if (!e) var e = window.event if (e.target) targ = e.target else if (e.srcElement) targ = e.srcElement if (targ.nodeType == 3) // defeat Safari bug targ = targ.parentNode var tname tname=targ.tagName alert("你点击了 " + tname + "元素") } </script> </head> <body onmousedown="whichElement(event)"> <p>在这里点击看看,这里是p</p> <h3>或者点击这里也可以呀,这里是h3</h3> <p>你想点我吗??</p> <img border="0" src="../myCode/btn.gif" width="100" height="26" alt="pic"> </body> </html>