郵箱下拉自動填充選擇示例代碼附圖

 這篇文章主要介紹了郵箱下拉自動填充選擇的具體實現,需要的朋友可以參考下

1.需要一個js文件：jquery.mailAutoComplete-3.1.js   代碼如下: (function($){  $.fn.mailAutoComplete = function(options){  var defaults = {  boxClass: "mailListBox", //外部box樣式  listClass: "mailListDefault", //默認的列表樣式  focusClass: "mailListFocus", //列表選樣式中  markCalss: "mailListHlignt", //高亮樣式  zIndex: 1,  autoClass: true, //是否使用插件自帶class樣式  mailArr: ["qq.com","gmail.com","126.com","163.com","hotmail.com","yahoo.com","yahoo.com.cn","live.com","sohu.com","sina.com"], //郵件數組  textHint: false, //文字提示的自動顯示與隱藏  hintText: "",  focusColor: "#333",  blurColor: "#999"  };  var settings = $.extend({}, defaults, options || {});    //頁面裝載CSS樣式  if(settings.autoClass && $("#mailListAppendCss").size() === 0){  $('<style id="mailListAppendCss" type="text/css">.mailListBox{border:1px solid #369; background:#fff; font:12px/20px Arial;}.mailListDefault{padding:0 5px;cursor:pointer;white-space:nowrap;}.mailListFocus{padding:0 5px;cursor:pointer;white-space:nowrap;background:#369;color:white;}.mailListHlignt{color:red;}.mailListFocus .mailListHlignt{color:#fff;}</style>').appendTo($("head"));  }  var cb = settings.boxClass, cl = settings.listClass, cf = settings.focusClass, cm = settings.markCalss; //插件的class變量  var z = settings.zIndex, newArr = mailArr = settings.mailArr, hint = settings.textHint, text = settings.hintText, fc = settings.focusColor, bc = settings.blurColor;  //創建郵件內部列表內容  $.createHtml = function(str, arr, cur){  var mailHtml = "";  if($.isArray(arr)){  $.each(arr, function(i, n){  if(i === cur){  mailHtml += '<div class="mailHover '+cf+'" id="mailList_'+i+'"><span class="'+cm+'">'+str+'</span>@'+arr[i]+'</div>';  }else{  mailHtml += '<div class="mailHover '+cl+'" id="mailList_'+i+'"><span class="'+cm+'">'+str+'</span>@'+arr[i]+'</div>';  }  });  }  return mailHtml;  };  //一些全局變量  var index = -1, s;  $(this).each(function(){  var that = $(this), i = $(".justForJs").size();  if(i > 0){ //只綁定一個文本框  return;  }  var w = that.outerWidth(), h = that.outerHeight(); //獲取當前對象（即文本框）的寬高  //樣式的初始化  that.wrap('<span style="display:inline-block;position:relative;"></span>')  .before('<div id="mailListBox_'+i+'" class="justForJs '+cb+'" style="min-width:'+w+'px;_width:'+w+'px;position:absolute;left:-6000px;top:'+h+'px;z-index:'+z+';"></div>');  var x = $("#mailListBox_" + i), liveValue; //列表框對象  that.focus(function(){  //父標簽的層級  $(this).css("color", fc).parent().css("z-index", z);  //提示文字的顯示與隱藏  if(hint && text){  var focus_v = $.trim($(this).val());  if(focus_v === text){  $(this).val("");  }  }  //鍵盤事件  $(this).keyup(function(e){  s = v = $.trim($(this).val());  if(/@/.test(v)){  s = v.replace(/@.*/, "");  }  if(v.length > 0){  //如果按鍵是上下鍵  if(e.keyCode === 38){  //向上  if(index <= 0){  index = newArr.length;  }  index--;  }else if(e.keyCode === 40){  //向下  if(index >= newArr.length - 1){  index = -1;  }  index++;  }else if(e.keyCode === 13){  //回車  if(index > -1 && index < newArr.length){  //如果當前有激活列表  $(this).val($("#mailList_"+index).text());  }  }else{  if(/@/.test(v)){  index = -1;  //獲得@後面的值  //s = v.replace(/@.*/, "");  //創建新匹配數組  var site = v.replace(/.*@/, "");  newArr = $.map(mailArr, function(n){  var reg = new RegExp(site);  if(reg.test(n)){  return n;  }  });  }else{  newArr = mailArr;  }  }  x.html($.createHtml(s, newArr, index)).css("left", 0);  if(e.keyCode === 13){  //回車  if(index > -1 && index < newArr.length){  //如果當前有激活列表  x.css("left", "-6000px");  }  }  }else{  x.css("left", "-6000px");  }  }).blur(function(){  if(hint && text){  var blur_v = $.trim($(this).val());  if(blur_v === ""){  $(this).val(text);  }  }  $(this).css("color", bc).unbind("keyup").parent().css("z-index",0);  x.css("left", "-6000px");    });  //鼠標經過列表項事件  //鼠標經過  $(".mailHover").live("mouseover", function(){  index = Number($(this).attr("id").split("_")[1]);  liveValue = $("#mailList_"+index).text();  x.children("." + cf).removeClass(cf).addClass(cl);  $(this).addClass(cf).removeClass(cl);  });  });    x.bind("mousedown", function(){  that.val(liveValue);  });  });  };    })(jQuery);    2.jq庫當然必不可少了，這裡就略了    下面來測試    3.樣式表：  代碼如下: <style type="text/css">  .out_box{border:1px solid #ccc; background:#fff; font:12px/20px Tahoma;}  .list_box{border-bottom:1px solid #eee; padding:0 5px; cursor:pointer;}  .focus_box{background:#f0f3f9;}  .mark_box{color:#c00;}  </style>    4.測試代碼  代碼如下: <p>自定義class展示：<input type="text" id="customTest" size="28" /></p>    <script src="js/jquery-1.6.min.js" type="text/javascript"></script>  <script src="js/jquery.mailAutoComplete-3.1.js" type="text/javascript"></script>  <script type="text/javascript">  $(function() {  $("#customTest").mailAutoComplete({  boxClass: "out_box", //外部box樣式  listClass: "list_box", //默認的列表樣式  focusClass: "focus_box", //列表選樣式中  markCalss: "mark_box", //高亮樣式  autoClass: false,  textHint: true, //提示文字自動隱藏  hintText: "請輸入郵箱地址"  });  })  </script>