Created
January 18, 2014 07:21
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键盘上下键头选中div的内容
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| <html> | |
| <head> | |
| <title>SimulateUpDownKeySelect</title> | |
| </head> | |
| <body> | |
| <input type="text" id="txtInput"/> | |
| <div id="divSelect"> | |
| <li>123</li> | |
| <li>456</li> | |
| <li>abc</li> | |
| <li>def</li> | |
| <li>zzz</li> | |
| </div> | |
| </body> | |
| <script type="text/javascript"> | |
| function $(sId) | |
| { | |
| return document.getElementById(sId); | |
| } | |
| function clearSelectedOptBgColor(target) | |
| { | |
| if (target.seletedIndex >= 0) | |
| target.options[target.seletedIndex].style.backgroundColor = ""; | |
| } | |
| function setSelectedOptBgColor(target) | |
| { | |
| target.options[target.seletedIndex].style.backgroundColor = "yellow"; | |
| } | |
| var upKeyCode = 38; | |
| var downKeyCode = 40; | |
| var enterKeyCode = 13; | |
| var oInput = $("txtInput"); | |
| oInput.options = $("divSelect").getElementsByTagName("li"); | |
| oInput.seletedIndex = -1; | |
| oInput.focus(); | |
| oInput.onkeyup = function(event){ | |
| if (event == undefined) | |
| event = window.event; | |
| switch (event.keyCode) | |
| { | |
| case upKeyCode: | |
| clearSelectedOptBgColor(this); | |
| this.seletedIndex--; | |
| if (this.seletedIndex < 0) | |
| this.seletedIndex = this.options.length - 1; | |
| setSelectedOptBgColor(this); | |
| break; | |
| case downKeyCode: | |
| clearSelectedOptBgColor(this); | |
| this.seletedIndex++; | |
| if (this.seletedIndex >= this.options.length) | |
| this.seletedIndex = 0; | |
| setSelectedOptBgColor(this); | |
| break; | |
| case enterKeyCode: | |
| this.value = this.options[this.seletedIndex].innerHTML; | |
| break; | |
| } | |
| }; | |
| oInput.onblur = function(){ | |
| clearSelectedOptBgColor(this); | |
| this.seletedIndex = -1; | |
| }; | |
| </script> | |
| </html> |
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