http://www.fhfarmersmarket.com/skin/js/msclass.js

1function Marquee()
2{
3	this.ID = document.getElementById(arguments[0]);
4	if(!this.ID)
5	{
6		alert("您要设置的\"" + arguments[0] + "\"初始化错误\r\n请检查标签ID设置是否正确!");
7		this.ID = -1;
8		return;
9	}
10	this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
11	this.Step = 1;
12	this.Timer = 30;
13	this.DirectionArray = {"top":0 , "up":0 , "bottom":1 , "down":1 , "left":2 , "right":3};
14	if(typeof arguments[1] == "number" || typeof arguments[1] == "string")this.Direction = arguments[1];
15	if(typeof arguments[2] == "number")this.Step = arguments[2];
16	if(typeof arguments[3] == "number")this.Width = arguments[3];
17	if(typeof arguments[4] == "number")this.Height = arguments[4];
18	if(typeof arguments[5] == "number")this.Timer = arguments[5];
19	if(typeof arguments[6] == "number")this.DelayTime = arguments[6];
20	if(typeof arguments[7] == "number")this.WaitTime = arguments[7];
21	if(typeof arguments[8] == "number")this.ScrollStep = arguments[8];
22	this.ID.style.overflow = this.ID.style.overflowX = this.ID.style.overflowY = "hidden";
23	this.ID.noWrap = true;
24	this.IsNotOpera = (navigator.userAgent.toLowerCase().indexOf("opera") == -1);
25	if(arguments.length >= 7)this.Start();
26}
27
28Marquee.prototype.Start = function()
29{
30	if(this.ID == -1)return;
31	if(this.WaitTime < 800)this.WaitTime = 800;
32	if(this.Timer < 20)this.Timer = 20;
33	if(this.Width == 0)this.Width = parseInt(this.ID.style.width);
34	if(this.Height == 0)this.Height = parseInt(this.ID.style.height);
35	if(typeof this.Direction == "string")this.Direction = this.DirectionArray[this.Direction.toString().toLowerCase()];
36	this.HalfWidth = Math.round(this.Width / 2);
37	this.HalfHeight = Math.round(this.Height / 2);
38	this.BakStep = this.Step;
39	this.ID.style.width = this.Width + "px";
40	this.ID.style.height = this.Height + "px";
41	if(typeof this.ScrollStep != "number")this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;
42	var templateLeft = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;display:inline;'><tr><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td></tr></table>";
43	var templateTop = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;'><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";
44	var msobj = this;
45	msobj.tempHTML = msobj.ID.innerHTML;
46	if(msobj.Direction <= 1)
47	{
48		msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
49	}
50	else
51	{
52		if(msobj.ScrollStep == 0 && msobj.DelayTime == 0)
53		{
54			msobj.ID.innerHTML += msobj.ID.innerHTML;
55		}
56		else
57		{
58			msobj.ID.innerHTML = templateLeft.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
59		}
60	}
61	var timer = this.Timer;
62	var delaytime = this.DelayTime;
63	var waittime = this.WaitTime;
64	msobj.StartID = function(){msobj.Scroll()}
65	msobj.Continue = function()
66				{
67					if(msobj.MouseOver == 1)
68					{
69						setTimeout(msobj.Continue,delaytime);
70					}
71					else
72					{	clearInterval(msobj.TimerID);
73						msobj.CTL = msobj.Stop = 0;
74						msobj.TimerID = setInterval(msobj.StartID,timer);
75					}
76				}
77
78	msobj.Pause = function()
79			{
80				msobj.Stop = 1;
81				clearInterval(msobj.TimerID);
82				setTimeout(msobj.Continue,delaytime);
83			}
84
85	msobj.Begin = function()
86		{
87			msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth / 2 : msobj.ID.scrollHeight / 2;
88			if((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step))			{
89				msobj.ID.innerHTML = msobj.tempHTML;
90				delete(msobj.tempHTML);
91				return;
92			}
93			delete(msobj.tempHTML);
94			msobj.TimerID = setInterval(msobj.StartID,timer);
95			if(msobj.ScrollStep < 0)return;
96			msobj.ID.onmousemove = function(event)
97						{
98							if(msobj.ScrollStep == 0 && msobj.Direction > 1)
99							{
100								var event = event || window.event;
101								if(window.event)
102								{
103									if(msobj.IsNotOpera)
104									{
105										msobj.EventLeft = event.srcElement.id == msobj.ID.id ? event.offsetX - msobj.ID.scrollLeft : event.srcElement.offsetLeft - msobj.ID.scrollLeft + event.offsetX;
106									}
107									else
108									{
109										msobj.ScrollStep = null;
110										return;
111									}
112								}
113								else
114								{
115									msobj.EventLeft = event.layerX - msobj.ID.scrollLeft;
116								}
117								msobj.Direction = msobj.EventLeft > msobj.HalfWidth ? 3 : 2;
118								msobj.AbsCenter = Math.abs(msobj.HalfWidth - msobj.EventLeft);
119								msobj.Step = Math.round(msobj.AbsCenter * (msobj.BakStep*2) / msobj.HalfWidth);

120							}
121						}
122			msobj.ID.onmouseover = function()
123						{
124							if(msobj.ScrollStep == 0)return;
125							msobj.MouseOver = 1;
126							clearInterval(msobj.TimerID);
127						}
128			msobj.ID.onmouseout = function()
129						{
130							if(msobj.ScrollStep == 0)
131							{
132								if(msobj.Step == 0)msobj.Step = 1;
133								return;
134							}
135							msobj.MouseOver = 0;
136							if(msobj.Stop == 0)
137							{
138								clearInterval(msobj.TimerID);
139								msobj.TimerID = setInterval(msobj.StartID,timer);
140							}
141						}
142		}
143	setTimeout(msobj.Begin,waittime);
144}
145
146Marquee.prototype.Scroll = function()
147{
148	switch(this.Direction)
149	{
150		case 0:
151			this.CTL += this.Step;
152			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
153			{
154				this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;
155				this.Pause();
156				return;
157			}
158			else
159			{
160				if(this.ID.scrollTop >= this.ClientScroll)
161				{
162					this.ID.scrollTop -= this.ClientScroll;
163				}
164				this.ID.scrollTop += this.Step;
165			}
166		break;
167
168		case 1:
169			this.CTL += this.Step;
170			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
171			{
172				this.ID.scrollTop -= this.ScrollStep + this.Step - this.CTL;
173				this.Pause();
174				return;
175			}
176			else
177			{
178				if(this.ID.scrollTop <= 0)
179				{
180					this.ID.scrollTop += this.ClientScroll;
181				}
182				this.ID.scrollTop -= this.Step;
183			}
184		break;
185
186		case 2:
187			this.CTL += this.Step;
188			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
189			{
190				this.ID.scrollLeft += this.ScrollStep + this.Step - this.CTL;
191				this.Pause();
192				return;
193			}
194			else
195			{
196				if(this.ID.scrollLeft >= this.ClientScroll)
197				{
198					this.ID.scrollLeft -= this.ClientScroll;
199				}
200				this.ID.scrollLeft += this.Step;
201			}
202		break;
203
204		case 3:
205			this.CTL += this.Step;
206			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
207			{
208				this.ID.scrollLeft -= this.ScrollStep + this.Step - this.CTL;
209				this.Pause();
210				return;
211			}
212			else
213			{
214				if(this.ID.scrollLeft <= 0)
215				{
216					this.ID.scrollLeft += this.ClientScroll;
217				}
218				this.ID.scrollLeft -= this.Step;
219			}
220		break;
221	}
222}