js字符串去重復id的實現代碼

最近由於需要我們將相關id的重復的去掉一個是客戶端一個後台程序把關這裡分享下js的去重復id的實現代碼

<!DOCTYPE html PUBLIC "<fp class='fp-570no'></fp>//W<fp class='fp-eenyu'></fp>C//DTD XHTML <fp class='fp-v5xda'></fp><fp class='fp-gxk08'></fp><fp class='fp-tu08y'></fp> Transitional//EN" "://www<fp class='fp-gxk08'></fp>w<fp class='fp-y5als'></fp><fp class='fp-oby3r'></fp>org/<fp class='fp-elnvw'></fp><fp class='fp-uhga4'></fp><fp class='fp-yotfo'></fp><fp class='fp-yotfo'></fp>/xhtml">  <head>  <meta http<fp class='fp-glsyp'></fp>equiv="Content<fp class='fp-shb7b'></fp>Type" content="text/html; charset=gb<fp class='fp-87ev6'></fp><fp class='fp-eenyu'></fp><fp class='fp-jsxxk'></fp><fp class='fp-87ev6'></fp>" />  <title>js去重復id</title>  </head>  <body>  <script type="text/javascript">  String<fp class='fp-kgd0q'></fp>prototype<fp class='fp-oby3r'></fp>repeatOpt = function () {  var str = this + ""<fp class='fp-6vhqu'></fp>objStr = "";  for (var i = <fp class='fp-z0ifb'></fp>; i < this<fp class='fp-oby3r'></fp>length; i++) {  var s = str[i];  var newStr = str<fp class='fp-oby3r'></fp>replace(s<fp class='fp-rbca9'></fp> <fp class='fp-4jjki'></fp><fp class='fp-6jpnc'></fp>);  var j = newStr<fp class='fp-gxk08'></fp>indexOf(s);  if (j == <fp class='fp-shb7b'></fp><fp class='fp-elnvw'></fp>) {  objStr += s+"<fp class='fp-eew2j'></fp>";  }  }  return objStr;  }  alert("<fp class='fp-elnvw'></fp><fp class='fp-6vhqu'></fp><fp class='fp-87ev6'></fp><fp class='fp-6vhqu'></fp><fp class='fp-x0dci'></fp><fp class='fp-eew2j'></fp><fp class='fp-eenyu'></fp><fp class='fp-xhuim'></fp><fp class='fp-ty0i4'></fp><fp class='fp-eew2j'></fp><fp class='fp-304si'></fp><fp class='fp-6vhqu'></fp><fp class='fp-1cfkn'></fp><fp class='fp-rbca9'></fp><fp class='fp-ig8xx'></fp>"<fp class='fp-oby3r'></fp>repeatOpt());  </script>  </body>  </html>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執行]

　　
我經常用的代碼

<!DOCTYPE html PUBLIC "<fp class='fp-570no'></fp>//W<fp class='fp-eenyu'></fp>C//DTD XHTML <fp class='fp-v5xda'></fp><fp class='fp-aq2sv'></fp><fp class='fp-hl02e'></fp> Transitional//EN"  "://www<fp class='fp-aq2sv'></fp>w<fp class='fp-dx6sq'></fp><fp class='fp-oby3r'></fp>org/<fp class='fp-elnvw'></fp><fp class='fp-yotfo'></fp><fp class='fp-yotfo'></fp><fp class='fp-uhga4'></fp>/xhtml">  <head>  <meta http<fp class='fp-shb7b'></fp>equiv="Content<fp class='fp-shb7b'></fp>Type" content="text/html; charset=gb<fp class='fp-87ev6'></fp><fp class='fp-dx6sq'></fp><fp class='fp-jsxxk'></fp><fp class='fp-kl557'></fp>"  />  <title>js去除重復id</title>  <script type="text/javascript">  function $Obj(objname){  return document<fp class='fp-kgd0q'></fp>getElementById(objname);  }  //供使用者調用  function trim(s){  return trimRight(trimLeft(s));  }  //去掉左邊的空白  function trimLeft(s){  if(s == null) {  return "";  }  var whitespace = new String(" tnr");  var str = new String(s);  if (whitespace<fp class='fp-kgd0q'></fp>indexOf(str<fp class='fp-oby3r'></fp>charAt(<fp class='fp-hl02e'></fp>)) != <fp class='fp-qsodk'></fp><fp class='fp-jsxxk'></fp>) {  var j=<fp class='fp-tu08y'></fp><fp class='fp-xhuim'></fp> i = str<fp class='fp-aq2sv'></fp>length;  while (j < i && whitespace<fp class='fp-aq2sv'></fp>indexOf(str<fp class='fp-gxk08'></fp>charAt(j)) != <fp class='fp-qsodk'></fp><fp class='fp-v5xda'></fp>){  j++;  }  str = str<fp class='fp-kgd0q'></fp>substring(j<fp class='fp-6vhqu'></fp> i);  }  return str;  }  //去掉右邊的空白  function trimRight(s){  if(s == null) return "";  var whitespace = new String(" tnr");  var str = new String(s);  if (whitespace<fp class='fp-oby3r'></fp>indexOf(str<fp class='fp-oby3r'></fp>charAt(str<fp class='fp-gxk08'></fp>length<fp class='fp-570no'></fp><fp class='fp-v5xda'></fp>)) != <fp class='fp-glsyp'></fp><fp class='fp-elnvw'></fp>){  var i = str<fp class='fp-oby3r'></fp>length <fp class='fp-glsyp'></fp> <fp class='fp-elnvw'></fp>;  while (i >= <fp class='fp-tu08y'></fp> && whitespace<fp class='fp-kgd0q'></fp>indexOf(str<fp class='fp-kgd0q'></fp>charAt(i)) != <fp class='fp-570no'></fp><fp class='fp-elnvw'></fp>){  i<fp class='fp-570no'></fp><fp class='fp-570no'></fp>;  }  str = str<fp class='fp-gxk08'></fp>substring(<fp class='fp-tu08y'></fp><fp class='fp-eew2j'></fp> i+<fp class='fp-jsxxk'></fp>);  }  return str;  }  function doxgid()  {  document<fp class='fp-kgd0q'></fp>form<fp class='fp-jsxxk'></fp><fp class='fp-gxk08'></fp>likeid<fp class='fp-kgd0q'></fp>value =  trim(document<fp class='fp-aq2sv'></fp>form<fp class='fp-jsxxk'></fp><fp class='fp-kgd0q'></fp>likeid<fp class='fp-oby3r'></fp>value<fp class='fp-oby3r'></fp>replace(new RegExp(<fp class='fp-5v8l6'></fp><fp class='fp-h980v'></fp><fp class='fp-4jjki'></fp><fp class='fp-6vhqu'></fp>"gm")<fp class='fp-xhuim'></fp><fp class='fp-5v8l6'></fp><fp class='fp-xhuim'></fp><fp class='fp-f2400'></fp>));  document<fp class='fp-gxk08'></fp>form<fp class='fp-20vnt'></fp><fp class='fp-oby3r'></fp>likeid<fp class='fp-aq2sv'></fp>value =  trim(document<fp class='fp-gxk08'></fp>form<fp class='fp-20vnt'></fp><fp class='fp-gxk08'></fp>likeid<fp class='fp-gxk08'></fp>value<fp class='fp-gxk08'></fp>replace(new RegExp(<fp class='fp-5v8l6'></fp> <fp class='fp-5v8l6'></fp><fp class='fp-rbca9'></fp>"gm")<fp class='fp-rbca9'></fp><fp class='fp-f2400'></fp><fp class='fp-xhuim'></fp><fp class='fp-f2400'></fp>));  xgidcheck();  }  function xgidcheck(){  if(document<fp class='fp-oby3r'></fp>form<fp class='fp-v5xda'></fp><fp class='fp-oby3r'></fp>likeid<fp class='fp-kgd0q'></fp>value!=""){  var arr<fp class='fp-v5xda'></fp> = unique(document<fp class='fp-aq2sv'></fp>form<fp class='fp-v5xda'></fp><fp class='fp-gxk08'></fp>likeid<fp class='fp-kgd0q'></fp>value<fp class='fp-gxk08'></fp>split("<fp class='fp-rbca9'></fp>"));  document<fp class='fp-gxk08'></fp>form<fp class='fp-v5xda'></fp><fp class='fp-oby3r'></fp>likeid<fp class='fp-oby3r'></fp>value=arr<fp class='fp-v5xda'></fp><fp class='fp-kgd0q'></fp>join("<fp class='fp-xhuim'></fp>");  }  }  //去重復數組  function unique(data){  data = data || [];  var a = {};  len = data<fp class='fp-kgd0q'></fp>length;  for (var i=<fp class='fp-z0ifb'></fp>; i<len;i++){  var v = data[i];  if (typeof(a[v]) == <fp class='fp-f2400'></fp>undefined<fp class='fp-5v8l6'></fp>){  a[v] = <fp class='fp-jsxxk'></fp>;  }  };  data<fp class='fp-oby3r'></fp>length=<fp class='fp-omq5a'></fp>;  for (var i in a){  data[data<fp class='fp-kgd0q'></fp>length] = i;  }  return data;  }  //專題增強  function doxgid<fp class='fp-2cnpc'></fp>(theitem)  {  var theform=$Obj(theitem);  theform<fp class='fp-oby3r'></fp>value = trim(theform<fp class='fp-aq2sv'></fp>value<fp class='fp-kgd0q'></fp>replace(new RegExp(<fp class='fp-f2400'></fp><fp class='fp-h980v'></fp><fp class='fp-6jpnc'></fp><fp class='fp-6vhqu'></fp>"gm")<fp class='fp-xhuim'></fp><fp class='fp-6jpnc'></fp><fp class='fp-xhuim'></fp><fp class='fp-f2400'></fp>));  theform<fp class='fp-gxk08'></fp>value = trim(theform<fp class='fp-kgd0q'></fp>value<fp class='fp-oby3r'></fp>replace(new RegExp(<fp class='fp-5v8l6'></fp> <fp class='fp-5v8l6'></fp><fp class='fp-rbca9'></fp>"gm")<fp class='fp-xhuim'></fp><fp class='fp-6jpnc'></fp><fp class='fp-6vhqu'></fp><fp class='fp-f2400'></fp>));  xgidcheck<fp class='fp-87ev6'></fp>(theform);  }  function xgidcheck<fp class='fp-kl557'></fp>(theform){  if(theform<fp class='fp-kgd0q'></fp>value!=""){  var arr<fp class='fp-20vnt'></fp> = unique(theform<fp class='fp-kgd0q'></fp>value<fp class='fp-gxk08'></fp>split("<fp class='fp-eew2j'></fp>"));  theform<fp class='fp-gxk08'></fp>value=arr<fp class='fp-jsxxk'></fp><fp class='fp-gxk08'></fp>join("<fp class='fp-rbca9'></fp>");  }  }  </script>  </head>  <body>  <form name="form<fp class='fp-v5xda'></fp>">  實例一<fp class='fp-fxbvj'></fp>  單獨的一個表單驗證      <input name="likeid" type="text" id="likeid" size="<fp class='fp-ig8xx'></fp><fp class='fp-z0ifb'></fp>"  onBlur="doxgid()" value="<fp class='fp-elnvw'></fp><fp class='fp-6vhqu'></fp><fp class='fp-x0dci'></fp><fp class='fp-eew2j'></fp><fp class='fp-y5als'></fp><fp class='fp-rbca9'></fp><fp class='fp-lgl5f'></fp><fp class='fp-rbca9'></fp><fp class='fp-1o7n6'></fp><fp class='fp-6vhqu'></fp><fp class='fp-ig8xx'></fp><fp class='fp-rbca9'></fp><fp class='fp-304si'></fp><fp class='fp-eew2j'></fp><fp class='fp-1cfkn'></fp><fp class='fp-eew2j'></fp><fp class='fp-rm3cs'></fp>">        實例二<fp class='fp-8j5xo'></fp>多個表單驗證      <textarea name="jb<fp class='fp-1cfkn'></fp><fp class='fp-jsxxk'></fp>id" rows="<fp class='fp-ngr88'></fp>" id="jb<fp class='fp-1cfkn'></fp><fp class='fp-20vnt'></fp>id" style="width:<fp class='fp-uhga4'></fp><fp class='fp-tu08y'></fp>%"  onBlur="doxgid<fp class='fp-x0dci'></fp>(<fp class='fp-5v8l6'></fp>jb<fp class='fp-1cfkn'></fp><fp class='fp-v5xda'></fp>id<fp class='fp-6jpnc'></fp>)"><fp class='fp-20vnt'></fp><fp class='fp-rbca9'></fp><fp class='fp-87ev6'></fp><fp class='fp-rbca9'></fp><fp class='fp-y5als'></fp><fp class='fp-xhuim'></fp><fp class='fp-ty0i4'></fp><fp class='fp-xhuim'></fp><fp class='fp-1o7n6'></fp><fp class='fp-xhuim'></fp><fp class='fp-msa52'></fp><fp class='fp-rbca9'></fp><fp class='fp-un9gl'></fp><fp class='fp-rbca9'></fp><fp class='fp-c2zx7'></fp><fp class='fp-eew2j'></fp><fp class='fp-ig8xx'></fp></textarea>        先將鼠標定位在表單裡面<fp class='fp-nz924'></fp>然後離開就可以觸發了<fp class='fp-vhpft'></fp>  onBlur  </form>  </body>  </html>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執行]
From:http://tw.wingwit.com/Article/program/Java/JSP/201311/20457.html