制作移动的浮动层

pop.js

2. function heartBeat() {
3. if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
4. if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
5. if(diffY != lastScrollY) {
6. percent = .1 * (diffY - lastScrollY);
7. if(percent > 0) percent = Math.ceil(percent);
8. else percent = Math.floor(percent);
9. if(IE) document.all.floater.style.pixelTop += percent;
10. if(NS) document.floater.top += percent; 
11. lastScrollY = lastScrollY + percent;
12. }
13. if(diffX != lastScrollX) {
14. percent = .1 * (diffX - lastScrollX);
15. if(percent > 0) percent = Math.ceil(percent);
16. else percent = Math.floor(percent);
17. if(IE) document.all.floater.style.pixelLeft += percent;
18. if(NS) document.floater.left += percent;
19. lastScrollX = lastScrollX + percent;
20. } 
21. }
24. function checkFocus(x,y) { 
25. stalkerx = document.floater.pageX;
26. stalkery = document.floater.pageY;
27. stalkerwidth = document.floater.clip.width;
28. stalkerheight = document.floater.clip.height;
29. if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;
30. else return false;
31. }
32. function grabIt(e) {
33. if(IE) {
34. whichIt = event.srcElement;
35. while (whichIt.id.indexOf("floater") == -1) {
36. whichIt = whichIt.parentElement;
37. if (whichIt == null) { return true; }
38. }
39. whichIt.style.pixelLeft = whichIt.offsetLeft;
40. whichIt.style.pixelTop = whichIt.offsetTop;
41. currentX = (event.clientX + document.body.scrollLeft);
42. currentY = (event.clientY + document.body.scrollTop); 
43. } else { 
44. window.captureEvents(Event.MOUSEMOVE);
45. if(checkFocus (e.pageX,e.pageY)) { 
46. whichIt = document.floater;
47. StalkerTouchedX = e.pageX-document.floater.pageX;
48. StalkerTouchedY = e.pageY-document.floater.pageY;
49. } 
50. }
51. return true;
52. }
53. function moveIt(e) {
54. if (whichIt == null) { return false; }
55. if(IE) {
56. newX = (event.clientX + document.body.scrollLeft);
57. newY = (event.clientY + document.body.scrollTop);
58. distanceX = (newX - currentX); distanceY = (newY - currentY);
59. currentX = newX; currentY = newY;
60. whichIt.style.pixelLeft += distanceX;
61. whichIt.style.pixelTop += distanceY;
62. if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;
63. if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft;
64. if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
65. if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
66. event.returnValue = false;
67. } else { 
68. whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);
69. if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;
70. if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;
71. if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
72. if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
73. return false;
74. }
75. return false;
76. }
77. function dropIt() {
78. whichIt = null;
79. if(NS) window.releaseEvents (Event.MOUSEMOVE);
80. return true;
81. }
83. if(NS) {
84. window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);
85. window.onmousedown = grabIt;
86. window.onmousemove = moveIt;
87. window.onmouseup = dropIt;
88. }
89. if(IE) {
90. document.onmousedown = grabIt;
91. document.onmousemove = moveIt;
92. document.onmouseup = dropIt;
93. }
94. if(NS || IE) action = window.setInterval("heartBeat()",1);
95. // -->

show.htm

 

           

              hello
             
           

           

asdfasdfsadf

           

asdfas

           

dfas

           

df

           

as

           

df

           

as

           

df

           

as

           

df

           

asd

           

f

           

asd

           

f

           

asd

           

fa

           

sd

           

asdf

           

as

           

df

           

asd

           

f

           

asd

           

fa

           

sdf

           

a

           

sdf

           

as

           

df

           

as

           

df

           

asdf