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Js simulated File Upload progress bar

Source: Internet
Author: User
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1 <! Doctype html public "-// W3C // dtd html 4.01 // EN ''http: // www.w3.org/TR/html4/strict.dtd">
2 3 4 <meta http-equiv = "content-type" content = "text/html; charset = UTF-8"/>
5 <title> JS simulated upload progress bar </title>
6 7 <body>
8 </body>
9 <script type = "text/javascript">
10 var bind = function (obj, func ){
11 return function (){
12 func. apply (obj, arguments );
13 };
14 };
15 var uploadBAR = function (container ){
16 container = (! Document. getElementById (container ))? This. createContainer (container): document. getElementById (container );
17 this. ostart = container. getElementsByTagName ('input') [0];
18 this. oinit = container. getElementsByTagName ('input') [1];
19 this. container = container;
20 this. nBar = container. id + '_ uploadbar ';
21 this. total = 95;
22 };
23 uploadBAR. prototype = {
24 addEventHandler: function (obj, type, func ){
25 if (! Obj) {return ;}
26 if (obj. addEventListener) {obj. addEventListener (type, func, false );}
27 else if (obj. attachEvent) {obj. attachEvent ("on" + type, func );}
28 else {obj ["on" + type] = func ;}
29 },
30 on: function (e ){
31 this. addEventHandler (this. ostart, 'click', bind (this, this. start ));
32 this. addEventHandler (this. oinit, 'click', bind (this, this. init ));
33 },
34 init: function (e ){
35 this. oinit. blur ();
36 if (this. up! = Undefined ){
37 clearInterval (this. up );
38}
39 this. x = this. y = 0;
40 this. ostart. value = 'start ';
41 this. ostart. disabled = false;
42 if (document. getElementById (this. nBar )){
43 var pBar = document. getElementById (this. nBar). parentNode;
44 pBar. removeChild (document. getElementById (this. nBar ));
45 if (pBar. getElementsByTagName ('div '). length = 0) {document. body. removeChild (pBar );}
46}
47 },
48 setTime: function (){
49 this. x ++;
50 },
51 createContainer: function (oName ){
52 var buildStart = document. createElement ('input ');
53 buildStart. value = 'start ';
54 buildStart. type = 'click ';
55 var buildInit = document. createElement ('input ');
56 buildInit. value = 'init ';
57 buildInit. type = 'click ';
58 var oDIV = document. createElement ('div ');
59 oDIV. id = oName;
60 oDIV. appendChild (buildStart );
61 oDIV. appendChild (buildInit );
62 document. body. appendChild (oDIV );
63 buildStart = buildInit = null;
64 return oDIV;
65 },
66 createBAR: function (){
67 if (document. getElementById (this. nBar )! = Undefined) {return ;}
68 if (document. getElementById ('bar _ iner ') = undefined ){
69 var Barcontainer = document. createElement ('div ');
70 Barcontainer. id = "bar_container ";
71 Barcontainer. style. width = "200px ";
72 Barcontainer. style. border = "1px solid #999 ";
73 Barcontainer. style. backgroundColor = "# ccc ";
74 Barcontainer. style. overflowX = "hidden ";
75 Barcontainer. style. position = (document. all )? "Absolute": "fixed ";
76 var bheight((document.doc umentElement. clientHeight-18)/2 + "px ",
77 bweight((document.doc umentElement. clientWidth-parseInt (Barcontainer. style. width)/2 + "px ";
78 Barcontainer. style. top = bHeight;
79 Barcontainer. style. left = bWeight;
80 document. body. appendChild (Barcontainer );
81}
82 var newBar = document. createElement ('div ');
83 newBar. innerHTML = '& nbsp ;';
84 newBar. id = this. nBar;
85 newBar. style. border = "5px solid # ccc ";
86 document. getElementById ('bar _ iner '). appendChild (newBar );
87 },
88 setBAR: function (xx ){
89 var BAR = document. getElementById (this. nBar );
90 BAR. style. backgroundColor = (xx = 100 )? "#00ff00": "#333 ";
91 BAR. style. width = xx + "% ";
92 BAR. style. textAlign = "center ";
93 BAR. style. color = "# FFF ";
94 BAR. style. fontWeight = "bold ";
95 if (xx = this. total ){
96 BAR. innerHTML = "complete ";
97 this. ostart. value = 'start ';
98 this. ostart. disabled = true;
99 setTimeout (bind (this, this. init), 1000 );
100}
101 },
102 go: function (xx ){
103 var ostart = this. ostart, x = this. x, total = this. total, _ x = bind (this, this. setTime), _ bar = bind (this, this. setBAR );
104 this. up = setInterval (function (){
105 if (x <total ){
106 x ++;
107 _ x ();
108}
109 else {
110 var _ up = bind (this, this. up );
111 clearInterval (_ up );
112 this. value = 'start ';
113 this. disabled = true;
114}
115 _ bar (x );
116}, 10 );
117 },
118 run: function (){
119 this. ostart. blur ();
120 if (this. x = undefined | this. x = this. total) {this. x = 0; this. y = 0 ;}
121 this. ostart. value = (this. ostart. value = 'start ')? "Pause": "start ";
122 this. y ++;
123 clearInterval (this. up );
124 if (this. y> 1) {this. y = 0; return ;}
125 this. go (this. x );
126 },
127 start: function (){
128 var createBAR = bind (this, this. createBAR );
129 var run = bind (this, this. run );
130 createBAR ();
131 run ();
132}
133 };
134 var bar1 = new uploadBAR ('upload ');
135 bar1.on ();
136 var bar2 = new uploadBAR ('upload1 ');
137 bar2.on ();
138 </script>
139

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