07/14 发表评论

OVERVIEW

This is a watermark input plugin for jQuery. Currently this is a beta release. This simple plugin allows forms with limited space to display additional information about the contents of a field.

USAGE

First, include the watermark input javascript file.

<script src="jquery.watermarkinput.js" type="text/javascript"></script>

Next, call the watermark function for those items you wish to have watermarked.

jQuery(function($){
   $("#first").Watermark("First");
   $("#mi").Watermark("MI");
   $("#last").Watermark("Last");
   $("#suffix").Watermark("Suffix");
});

Optionally, if you are not satisfied with the default gray watermark color, you may pass a second argument to the watermark function.

jQuery(function($){
   $("#suffix").Watermark("Suffix","#369");
});

Finally, once you are ready to pull data from your watermarked input boxes, you can clear all of the watermarks and then replace them after you are finished.

function UseData(){
   $.Watermark.HideAll();
   //Do Stuff
   $.Watermark.ShowAll();
}

JS 插件

/*
 * Copyright (c) 2007 Josh Bush (digitalbush.com)
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:

 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * Version: Beta 1
 * Release: 2007-06-01
 */
(function($) {
    var map=new Array();
    $.Watermark = {
        ShowAll:function(){
            for (var i=0;i<map.length;i++){
                if(map[i].obj.val()==""){
                    map[i].obj.val(map[i].text);
                    map[i].obj.css("color",map[i].WatermarkColor);
                }else{
                    map[i].obj.css("color",map[i].DefaultColor);
                }
            }
        },
        HideAll:function(){
            for (var i=0;i<map.length;i++){
                if(map[i].obj.val()==map[i].text)
                    map[i].obj.val("");
            }
        }
    }

    $.fn.Watermark = function(text,color) {
        if(!color)
            color="#aaa";
        return this.each(
            function(){
                var input=$(this);
                var defaultColor=input.css("color");
                map[map.length]={text:text,obj:input,DefaultColor:defaultColor,WatermarkColor:color};
                function clearMessage(){
                    if(input.val()==text)
                        input.val("");
                    input.css("color",defaultColor);
                }

                function insertMessage(){
                    if(input.val().length==0 || input.val()==text){
                        input.val(text);
                        input.css("color",color);
                    }else
                        input.css("color",defaultColor);
                }

                input.focus(clearMessage);
                input.blur(insertMessage);
                input.change(insertMessage);

                insertMessage();
            }
        );
    };
})(jQuery);

原文:http://digitalbush.com/projects/watermark-input-plugin/

发表评论

回到顶端