stylesheets/sticky.js

   1 // Make a layer that stays in the same place on screen when scrolling the browser window.
   2 // Version 1.2
   3 // See http://www.mark.ac/help for browser support.
   4
   5 var mySticky;
   6 var theLayer;
   7
   8 // Setup variables for sliding.
   9 // lastY and staticYOffset should match your CSS top definition.
  10
  11 lastY=10;YOffset=0;staticYOffset=10;refreshMS=25;
  12
  13
  14 // Setup function that runs when the page loads.
  15         function setup(eID){
  16                 bw=new checkBrowser;
  17                 if(bw.ns4||bw.opera){MM_reloadPage(true);}
  18                 var noFix=bw.ie4||bw.ns4||(bw.ns6&&bw.mac)||(bw.macie50)?true:false;
  19                 if (window.attachEvent){fix_bind()}
  20                 else if(noFix){
  21                         if(bw.ns6){document.getElementById(eID).style.position="absolute";}
  22                         if(bw.macie50){document.getElementById(eID).style.position="absolute";document.getElementById(eID).style.backgroundColor="#ccffcc";}
  23                         if(bw.ns6&&YOffset==0){YOffset=-15}
  24                         mySticky=new makeLayerObj(eID);
  25                         layerSlide(eID)}
  26                 else{
  27                         mySticky=new makeLayerObj(eID);
  28                         mySticky.css.position="fixed";}
  29
  30                 if(!mySticky){mySticky=new makeLayerObj(eID);}
  31                 //mySticky.css.visibility="visible";
  32         }
  33
  34
  35 // -------------------------
  36 // emulate css 'position: fixed' in IE5+ Win
  37 // code by aclover@1value.com
  38         fix_elements = new Array();
  39
  40         function fix_event(){
  41                 var i;
  42                 for (i=0; i < fix_elements.length; i++){
  43                         fix_elements[i].style.left = parseInt(fix_elements[i].fix_left)+document.getElementsByTagName('html')[0].scrollLeft+document.getElementsByTagName('body')[0].scrollLeft+'px';
  44                         fix_elements[i].style.top = parseInt(fix_elements[i].fix_top)+document.getElementsByTagName('html')[0].scrollTop+document.getElementsByTagName('body')[0].scrollTop+'px';
  45                 }
  46         }
  47
  48         function fix_bind(){
  49                 var i;
  50                 for (i=0; i < document.all.length; i++){
  51                         if (document.all[i].currentStyle.position=='fixed'){
  52                                 document.all[i].fix_left = document.all[i].currentStyle.left;
  53                                 document.all[i].fix_top = document.all[i].currentStyle.top;
  54                                 document.all[i].style.position = 'absolute';
  55                                 fix_elements[fix_elements.length] = document.all[i];
  56                                 window.attachEvent('onscroll', fix_event);
  57                                 window.attachEvent('onresize', fix_event);
  58                         }
  59                 }
  60         }
  61 // -------------------------
  62
  63
  64 // -------------------------
  65 // DHTML menu sliding. Requires checkBrowser()
  66 // Based on source at http://www.simplythebest.net/
  67         function layerSlide(layerID) {
  68                 if(bw.dhtml){
  69                         if(!mySticky){mySticky=new makeLayerObj(layerID);}
  70                         if (bw.ns) {winY = window.pageYOffset;}
  71                         else if (bw.ie) {winY = document.body.scrollTop;}
  72                         if (bw.ie||bw.ns) {
  73                                 if (winY!=lastY&&winY>YOffset-staticYOffset){smooth = .3 * (winY - lastY - YOffset + staticYOffset);}
  74                                 else if (YOffset-staticYOffset+lastY>YOffset-staticYOffset){smooth = .3 * (winY - lastY - (YOffset-(YOffset-winY)));}
  75                                 else{smooth=0}
  76                                 if(smooth > 0) {smooth = Math.ceil(smooth);}
  77                                 else{smooth = Math.floor(smooth);}
  78                                 if (bw.ie){mySticky.css.pixelTop+=smooth;}
  79                                 else if (bw.ns){mySticky.css.top=parseInt(mySticky.css.top)+smooth;}
  80                                 lastY = lastY+smooth;
  81                                 top.window.status=new Date()
  82                                 setTimeout('layerSlide("'+layerID+'")', refreshMS)}}}
  83 // -------------------------
  84
  85 // Netscape 4.x browser resize fix
  86         function MM_reloadPage(init) {
  87         if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
  88         document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; top.onresize=MM_reloadPage; }}
  89         else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) {location.reload();}}
  90
  91 // Create browser-independent layer and browser objects
  92         function makeLayerObj(eID){
  93                 if(document.getElementById){this.css=document.getElementById(eID).style}
  94                 else if(document.layers){this.css=document.layers[eID];}
  95                 else if(document.all){this.css=document.all[eID].style;}
  96                 return this
  97         }
  98
  99         function checkBrowser(){
 100                 this.ver=navigator.appVersion;
 101                 this.name=navigator.appName;
 102                 this.mac=(navigator.platform.toLowerCase().indexOf('mac')>-1)?true:false;
 103                 this.opera=(navigator.userAgent.toLowerCase().indexOf('opera')>-1)?true:false;
 104                 this.dom=document.getElementById?true:false;
 105                 this.ns=(this.name=='Netscape');
 106                 this.ie4=(document.all && !this.dom)?true:false;
 107                 this.ie=(this.name =='Microsoft Internet Explorer'&&!this.opera)?true:false;
 108                 this.ie5=(this.ie && (navigator.userAgent.indexOf("MSIE 5")!=-1))?true:false;
 109                 this.macie50=(this.mac&&this.ie5&&(navigator.userAgent.indexOf("MSIE 5.0")!=-1))?true:false
 110                 this.ns4=(this.ns && parseInt(this.ver) == 4)?true:false;
 111                 this.ns6=((this.name=="Netscape")&&(parseInt(this.ver)==5))?true:false
 112                 this.standards=document.getElementById?true:false;
 113                 this.dhtml=this.standards||this.ie4||this.ns4;
 114         }
 115
 116         function showMe(eID){
 117                 myFloater=new makeLayerObj(eID)
 118                 myFloater.css.visibility="visible";
 119         }
 120
 121         function hideMe(eID){
 122                 myFloater=new makeLayerObj(eID)
 123                 myFloater.css.visibility="hidden";
 124         }