学习JQuery实现网页中分隔条的功能

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在C/S系统中有专门的分隔条控件，很方便实现，但在Asp.net中却没有。本文介绍了一种使用JQuery技术实现分隔条的功能。

Javascript代码如下，将该代码保存成JS文件后在HTML中引用。

jsplit

  1 jQuery.noConflict();
  2 jQuery.fn.extend({
  3     jsplit: function (j) {
  4         return this.each(function () {
  5             j = j || {};
  6             j.Btn = j.Btn || {};
  7             j.Btn.oBg = j.Btn.oBg || {};
  8             j.Btn.cBg = j.Btn.cBg || {};
  9             var jun = { MaxW: "600px"
10                         , MinW: "260px"
11                         , FloatD: "left"
12                         , IsClose: false
13                         , BgUrl: ""
14                         , Bg: "#fff"
15                         , Btn: { btn: true
16                                 , oBg: { Out: "#333", Hover: "orange" }
17                                 , cBg: { Out: "#333", Hover: "orange"}
18                         }
19                 , Fn: function () { }
20             }
21             j.MaxW = parseInt(j.MaxW) || parseInt(jun.MaxW);
22             j.MinW = parseInt(j.MinW) || parseInt(jun.MinW);
23             j.FloatD = j.FloatD || jun.FloatD;
24             j.IsClose = j.IsClose != undefined ? j.IsClose : jun.IsClose;
25             j.BgUrl = j.BgUrl || jun.BgUrl;
26             j.Bg = j.Bg || jun.Bg;
27             j.Btn.btn = j.Btn.btn != undefined ? j.Btn.btn : jun.Btn.btn;
28             j.Btn.oBg.Out = j.Btn.oBg.Out || jun.Btn.oBg.Out;
29             j.Btn.oBg.Hover = j.Btn.oBg.Hover || jun.Btn.oBg.Hover;
30             j.Btn.cBg.Out = j.Btn.cBg.Out || jun.Btn.cBg.Out;
31             j.Btn.cBg.Hover = j.Btn.cBg.Hover || jun.Btn.cBg.Hover;
32             j.Fn = j.Fn || jun.Fn;
33             var antiD = j.FloatD == "left" ? "right" : "left";
34             if (j.MinW > j.MaxW) {
35                 var amax = j.MaxW;
36                 j.MaxW = j.MinW;
37                 j.MinW = amax;
38             };
39             var _self = this;
40             var Close = false;
41             jQuery(_self).css({ position: "relative", float: j.FloatD, overflow: "hidden", padding: "0px" });
42             jQuery(_self).wrapInner("<div class='jsplit-c' style='top:0px;z-index:9999;zoom:1;width:100%;overflow:hidden;position:relative;height:100%'></div>");
43             jQuery(_self).children(".jsplit-c").append("<div class='jsplit-e' unselectable='on' style='background:#fff;height:100%;width:6px;top:0px;-moz-user-select:none;" + antiD + ":0px;position:absolute;cursor:e-resize;overflow:hidden;z-index:10000;'><div class='jsplit-e-handle'  unselectable='on'  style='height:40px;width:100%;top:50%;margin-top:-20px;left:0;position:absolute;cursor:pointer;-moz-user-select:none;'></div></div>");
44             var dw = jQuery(_self).width();
45             var jsplitc = jQuery(_self).children(".jsplit-c");
46             var jsplite = jsplitc.children(".jsplit-e");
47             var jsplith = jsplite.children(".jsplit-e-handle");
48             if (j.Btn.btn == false) { jsplith.css({ display: "none" }) };
49             if (jQuery.browser.msie) { document.execCommand("BackgroundImageCache", false, true); }
50             if (dw > j.MaxW) { jQuery(_self).css({ width: j.MaxW }); }
51             if (dw < j.MinW) { jQuery(_self).css({ width: j.MinW }); }
52             jsplite.css({ background: j.Bg, "background-image": j.BgUrl, opacity: 0 })
53             if (j.IsClose != false) {
54                 jsplith.css({ background: j.Btn.cBg.Out, "background-image": j.BgUrl })
55                 _selfclose();
56             } else {
57                 jsplith.css({ background: j.Btn.oBg.Out, "background-image": j.BgUrl })
58             }
59             jsplith.hover(function () {
60                 if (Close == false) {
61                     jQuery(this).css({ background: j.Btn.oBg.Hover, "background-image": j.BgUrl })
62                 } else { jQuery(this).css({ background: j.Btn.cBg.Hover, "background-image": j.BgUrl }) }
63             }, function () {
64                 if (Close == false) {
65                     jQuery(this).css({ background: j.Btn.oBg.Out, "background-image": j.BgUrl })
66                 } else { jQuery(this).css({ background: j.Btn.cBg.Out, "background-image": j.BgUrl }) }
67             })
68             jQuery(_self).hover(function () { if (Close == false) jsplite.stop().animate({ opacity: 0.85 }, 200) }, function () { if (Close == false) jsplite.stop().animate({ opacity: 0 }, 2000) })
69             jsplite.mousedown(function (e) {
70                 j['Fn'] && j['Fn'].call(_self);
71                 var screenX = e.screenX, w = jQuery(_self).width();
72                 jQuery(document).mousemove(function (e2) {
73                     curW = j.FloatD == "left" ? w + (e2.screenX - screenX) : w - (e2.screenX - screenX);
74                     if (curW >= j.MaxW) { curW = j.MaxW; };
75                     if (curW <= j.MinW) { curW = j.MinW; };
76                     jQuery(_self).css({ width: curW });
77                     dw = curW;
78                 });
79                 jQuery(document).mouseup(function () {
80                     jQuery(document).unbind();
81                 });
82                 if (Close == true) {
83                     jQuery(this).css({ cursor: "e-resize", opacity: 0.8 });
84                     jQuery(_self).animate({ width: dw }, 200);
85                     Close = false;
86                 };
87                 return false;
88             });
89             jsplite.dblclick(function () {
90                 if (Close == false) {
91                     _selfclose();
92                 };
93                 return false;
94             });
95             jsplith.click(function () {
96                 if (Close == false) {
97                     _selfclose();
98                 };
99                 return false;
100             });
101             function _selfclose() {
102                 jsplite.css({ cursor: "pointer", opacity: 1 });
103                 jsplith.css({ background: j.Btn.cBg.Out, "background-image": j.BgUrl });
104                 jQuery(_self).animate({ width: "6px" }, 400);
105                 Close = true;
106             }
107
108
109         });
110     }
111 });

按以下步骤修改HTML文件：
1. 增加对JQuery和刚刚生成的jsplit.js文件的引用。 

<script language='javascript' src='jquery-1.4.4.min.js'></script>
<script language='javascript' src='jsplit.js'></script>

2. 为要被拖动大小的DIV或TD定义ID。

<table>
    <tr>
        <td id="tt" style="background:#999999">test</td>
        <td style="background:#009999" width="400">test Table</td>
    </tr>
</table>

3. 增加Javascript调用Split。

<script type="text/javascript"> 
        $(document).ready(function(){
    jQuery('#tt').jsplit();                    
        });
</script>

这样就实现了客户端的分隔条的功能，如下图所示：