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js删除select中重复项的实现代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>删除select中重复项</title> <style type="text/css"> body{ text-align:center;} div{ width:400px; background:#f1f5fa; margin:auto; border:solid 1px #BFC9DB; padding:10px;} h4{ } a{text-align:right; display:block; font-size:12px;} </style> <img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%3E%20%0D%0A%2F*%E5%AE%9A%E4%B9%89%E5%85%A8%E5%B1%80%E5%87%BD%E6%95%B0%24*%2F%20%0D%0Afunction%20%24(id)%7B%20%0D%0Areturn%20document.getElementById(id)%3B%20%0D%0A%7D%20%0D%0A%2F*%E5%88%9D%E5%A7%8B%E5%8C%96select*%2F%20%0D%0Afunction%20InitialSelectOption(id)%7B%20%0D%0Avar%20oSel%3D%24(id)%3B%20%0D%0Avar%20aOptions%3D%5B%22Wang%20Hongjian%22%2C%22Wang%20Hongjian%22%2C%22Nichoal%20Smith%22%2C%22Nichoal%20Smith%22%2C%22David%20Gates%22%2C%22David%20Gates%22%2C%22David%20Gates%22%2C%22Wang%20Hongjian%22%2C%22Wang%20Hongjian%22%2C%22Nichoal%20Smith%22%2C%22Nichoal%20Smith%22%2C%22David%20Gates%22%2C%22David%20Gates%22%2C%22David%20Gates%22%5D%3B%20%0D%0Avar%20i%3D0%3B%20%0D%0AoSel.options.length%3D0%3B%20%0D%0Awhile(i%3CaOptions.length)%7B%20%0D%0Avar%20option%3Dnew%20Option(aOptions%5Bi%5D%2Ci)%3B%20%0D%0AoSel.options.add(option)%3B%20%0D%0Ai%2B%2B%3B%20%0D%0A%7D%20%0D%0AoSel.setAttribute(%22size%22%2Ci-1)%3B%20%0D%0A%24(%22btnDistinct%22).removeAttribute(%22disabled%22)%3B%20%0D%0A%7D%20%0D%0A%2F*%E5%88%A0%E9%99%A4%E9%87%8D%E5%A4%8D%E9%A1%B9*%2F%20%0D%0Afunction%20DistinctSelectOption(id)%7B%20%0D%0Avar%20oSel%3D%24(id)%3B%20%0D%0Avar%20i%3D0%3B%20%0D%0Awhile(i%3CoSel.options.length)%7B%20%0D%0Avar%20j%3Di%2B1%3B%20%0D%0Awhile(j%3CoSel.options.length)%7B%20%0D%0Aif(oSel.options%5Bi%5D.text%3D%3DoSel.options%5Bj%5D.text)%7B%20%0D%0AoSel.options%5Bj%5D%3Dnull%3B%2F%2F%E4%B8%8D%E5%8F%AF%E4%BD%BF%E7%94%A8oSel.options.remove(j)%EF%BC%8C%E5%9B%A0%E4%B8%BA%E4%B8%8D%E5%85%BC%E5%AE%B9firefox%20%0D%0A%7Delse%7B%20%0D%0Aj%2B%2B%3B%20%0D%0A%7D%20%0D%0A%7D%20%0D%0Ai%2B%2B%3B%20%0D%0A%7D%20%0D%0AoSel.setAttribute(%22size%22%2Ci)%3B%20%0D%0A%24(%22btnDistinct%22).setAttribute(%22disabled%22%2C%22disabled%22)%3B%20%0D%0A%7D%20%0D%0Awindow.onload%3Dfunction()%7B%20%0D%0A%2F*%E5%88%9D%E5%A7%8B%E5%8C%96*%2F%20%0D%0A%24(%22btnInital%22).onclick%3Dfunction()%7BInitialSelectOption(%22sel%22)%3B%7D%3B%20%0D%0A%2F*%E5%88%A0%E9%99%A4%E9%87%8D%E5%A4%8D%E9%A1%B9*%2F%20%0D%0A%24(%22btnDistinct%22).onclick%3Dfunction()%7BDistinctSelectOption(%22sel%22)%3B%7D%3B%20%0D%0A%24(%22btnDistinct%22).setAttribute(%22disabled%22%2C%22disabled%22)%3B%20%0D%0A%7D%20%0D%0A%3C%2Fscript%3E"> </head> <body> <div> <h4>删除select重复项演示</h4> <a href="http://www.glzy8.com/" _ewebeditor_ta_href="http%3A%2F%2Fwww.glzy8.com%2F" target="_blank" title="http://www.glzy8.com/">http://www.glzy8.com/</a> <hr /> <select id="sel" multiple="multiple" size="1"><option>待初始化…</select> <hr /> <button id="btnInital">初始化</button> <button id="btnDistinct">删除重复项</button> </div> </body> </html>
[Ctrl+A 全选 注:
如需引入外部Js需刷新才能执行
]
效果
来源:51obj
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