3 // Overlay.js, adapted from Floating image II on dynamicdrive.com
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7 <script LANGUAGE="JavaScript1.2" src="overlay.js"></script>
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10 <body onload="overlaySetup(corner)">
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11 <div id="overlayDiv" STYLE="position:absolute;visibility:visible;">
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12 ...body of overlay...
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17 var overlayNS4 = document.layers ? 1 : 0;
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18 var overlayIE = document.all ? 1 : 0;
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19 var overlayNS6 = document.getElementById && !document.all ? 1 : 0;
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21 var overlayPadX = 15;
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22 var overlayPadY = 15;
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23 var overlayDelay = 60;
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25 var overlayCorner = 'ur'; // ul, ll, ur, lr, uc, lc, cl, cr
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27 function overlayRefresh() {
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37 var links = document.getElementsByTagName("body")[0];
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40 overlayLx = document.body.clientWidth;
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41 overlayLy = document.body.clientHeight;
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43 if (document.body.parentElement) {
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45 overlayLx = document.body.parentElement.clientWidth;
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46 overlayLy = document.body.parentElement.clientHeight;
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49 overlayH = overlayDiv.offsetHeight;
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50 overlayW = body.offsetWidth; // overlayDiv.offsetWidth;
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51 contentH = body.offsetHeight;
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52 } else if (overlayNS4) {
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53 overlayLy = window.innerHeight;
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54 overlayLx = window.innerWidth;
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55 overlayH = document.overlayDiv.clip.height;
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56 overlayW = body.clip.width; // document.overlayDiv.clip.width;
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57 contentH = body.clip.height;
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58 } else if (overlayNS6) {
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59 var odiv = document.getElementById('overlayDiv');
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61 overlayLy = window.innerHeight;
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62 overlayLx = window.innerWidth;
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63 overlayH = odiv.offsetHeight;
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64 overlayW = odiv.offsetWidth; // body.offsetWidth;
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65 contentH = odiv.offsetHeight;
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68 if (overlayCorner == 'ul') {
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69 overlayX = overlayPadX;
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70 overlayY = overlayPadY;
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71 } else if (overlayCorner == 'cl') {
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72 overlayX = overlayPadX;
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73 overlayY = (overlayLy - overlayH) / 2;
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74 } else if (overlayCorner == 'll') {
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75 overlayX = overlayPadX;
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76 overlayY = (overlayLy - overlayH) - overlayPadY;
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77 } else if (overlayCorner == 'ur') {
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78 overlayX = (overlayLx - overlayW) - overlayPadX;
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79 overlayY = overlayPadY;
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80 } else if (overlayCorner == 'cr') {
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81 overlayX = (overlayLx - overlayW) - overlayPadX;
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82 overlayY = (overlayLy - overlayH) / 2;
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83 } else if (overlayCorner == 'lr') {
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84 overlayX = (overlayLx - overlayW) - overlayPadX;
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85 overlayY = (overlayLy - overlayH) - overlayPadY;
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86 } else if (overlayCorner == 'uc') {
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87 overlayX = (overlayLx - overlayW) / 2;
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88 overlayY = overlayPadY;
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89 } else { // overlayCorner == 'lc'
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90 overlayX = (overlayLx - overlayW) / 2;
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91 overlayY = (overlayLy - overlayH) - overlayPadY;
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95 overlayDiv.style.left=overlayX;
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96 overlayDiv.style.top=overlayY+document.body.scrollTop;
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98 if (contentH > overlayLy) {
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99 overlayDiv.style.visibility = "hidden";
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101 } else if (overlayNS4) {
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102 document.overlayDiv.pageX=overlayX;
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103 document.overlayDiv.pageY=overlayY+window.pageYOffset;
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104 document.overlayDiv.visibility="visible";
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106 if (contentH > overlayLy) {
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107 document.overlayDiv.style.visibility = "hidden";
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109 } else if (overlayNS6) {
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110 var div = document.getElementById("overlayDiv");
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111 var leftpx = overlayX;
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112 var toppx = overlayY+window.pageYOffset;
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113 var widthpx = overlayW;
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115 div.style.left = leftpx + "px";
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116 div.style.top = toppx + "px";
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117 div.style.width = widthpx + "px";
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119 if (contentH > overlayLy) {
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120 div.style.visibility = "hidden";
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122 div.style.visibility = "visible";
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131 function loopfunc() {
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133 setTimeout('loopfunc()',overlayDelay);
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136 function overlaySetup(corner) {
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137 overlayCorner = corner;
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139 if (overlayIE || overlayNS4 || overlayNS6) {
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