// JavaScript Document
// Basic Element Animator (11-October-2008) DRAFT
// by Vic Phillips http://www.vicsjavascripts.org.uk

// To progressively change the Left, Top, Width, Height or Opacity of an element over a specified period of time.

// **** Application Notes

// **** The HTML Code
//
// when moving an element the inline or class rule style position of the element should be assigned as
// 'position:relative;' or 'position:absolute;'
//
// The element would normally be assigned a unique ID name.
//

// **** Executing the Effect(Script)
//
// The effect is executed by an event call to function 'zxcBAnimator('left','tst1',20,260,2000);'
// where:
// parameter 0 = the mode(see Note 1).                                                                     (string)
// parameter 1 = the unique ID name or element object.                                                     (string or element object)
// parameter 2 = the start position of the effect.                                                         (digits, for opacity minimum 0, maximum 100)
// parameter 3 = the finish position of the effect.                                                        (digits, for opacity minimum 0, maximum 100)
// parameter 4 = (optional) period of time between the start and finish of the effect in milliseconds.     (digits or defaults to 2000 milliSeconds)
//
//  Note 1:  The default units(excepting opacity) are 'px'.
//  Note 2:  Examples modes: 'left', 'top', 'width', 'height', 'opacity.
//           For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
//  Note 3:  To 'toggle' the effect include '#' in parameter 0.
//           The first call will set the toggle parameters.
//           Subsequent calls with '#' in parameter 0 and the same start and finish parameters will 'toggle' the effect.
//  Note 4:  The function may be re-executed with a different set of parameters (start/finish time or period)
//           whenever required, say from an onclick/mouseover/out event.
//           The period parameter will be retained unless re-specified.
//
// **** Advanced Applications
//
//  It may be required to access the current value of the effect.
//  The element effect is accessible from the element property
//  element effect = elementobject[mode.replace(/[-#]/g,'')+'oop'];
//  where mode is parameter 0 of the initial call.
//  An array storing the current, start and finish values of the element effect may be accessed
//  from the element effect.data as fields 0, 1 and 2 respectively
//

// **** General
//
// All variable, function etc. names are prefixed with 'zxc' to minimise conflicts with other JavaScripts.
// These characters may be changed to characters of choice using global find and replace.
//
// The Functional Code(about 2K) is best as an External JavaScript.
//
// Tested with IE7 and Mozilla FireFox on a PC.
//



// **** Functional Code - NO NEED to Change


function zxcBAnimator(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime){
 if (typeof(zxcobj)=='string'){ zxcobj=document.getElementById(zxcobj); }
 if (!zxcobj||(!zxcsrt&&!zxcfin)||zxcsrt==zxcfin) return;
 var zxcoop=zxcobj[zxcmde.replace(/[-#]/g,'')+'oop'];
 if (zxcoop){
  clearTimeout(zxcoop.to);
  if (zxcoop.srtfin[0]==zxcsrt&&zxcoop.srtfin[1]==zxcfin&&zxcmde.match('#')) zxcoop.update([zxcoop.data[0],(zxcoop.srtfin[0]==zxcoop.data[2])?zxcfin:zxcsrt],zxctime);
  else zxcoop.update([zxcsrt,zxcfin],zxctime);
 }
 else zxcobj[zxcmde.replace(/[-#]/g,'')+'oop']=new zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime);
}

function zxcBAnimatorOOP(zxcmde,zxcobj,zxcsrt,zxcfin,zxctime){
 this.srtfin=[zxcsrt,zxcfin];
 this.to=null;
 this.obj=zxcobj;
 this.mde=zxcmde.replace(/[-#]/g,'');
 this.update([zxcsrt,zxcfin],zxctime);
}

zxcBAnimatorOOP.prototype.update=function(zxcsrtfin,zxctime){
 this.time=zxctime||this.time||2000;
 this.data=[zxcsrtfin[0],zxcsrtfin[0],zxcsrtfin[1]];
 this.srttime=new Date().getTime();
 this.cng();
}

zxcBAnimatorOOP.prototype.cng=function(){
 var zxcms=new Date().getTime()-this.srttime;
 this.data[0]=(this.data[2]-this.data[1])/this.time*zxcms+this.data[1];
 if (this.mde!='left'&&this.mde!='top'&&this.data[0]<0) this.data[0]=0;
 if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
 else  zxcOpacity(this.obj,this.data[0]);
 if (zxcms<this.time) this.to=setTimeout(function(zxcoop){return function(){zxcoop.cng();}}(this),10);
 else {
  this.data[0]=this.data[2];
  if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
  else zxcOpacity(this.obj,this.data[0]);
 }
}

function zxcOpacity(zxcobj,zxcopc){
 if (zxcopc<0||zxcopc>100) return;
 zxcobj.style.filter='alpha(opacity='+zxcopc+')';
 zxcobj.style.opacity=zxcobj.style.MozOpacity=zxcobj.style.KhtmlOpacity=zxcopc/100-.001;
}

function zxcWWHS(){
 if (window.innerHeight) return [window.innerWidth-10,window.innerHeight-10,window.pageXOffset,window.pageYOffset];
 else if (document.documentElement.clientHeight) return [document.documentElement.clientWidth-10,document.documentElement.clientHeight-10,document.documentElement.scrollLeft,document.documentElement.scrollTop];
 return [document.body.clientWidth,document.body.clientHeight,document.body.scrollLeft,document.body.scrollTop];
}


function Move(id,dis){
 var obj=document.getElementById(id);
 var lft=obj.offsetLeft;
 zxcBAnimator('left',id,lft,lft+(dis||0),500);
}

function FMToogle(){
 var FMobj=document.getElementById('FMFromSEC');
 //alert(FMobj.offsetLeft);
 if(FMobj.offsetLeft < -439 ){
  var move_dist = 445;
  grayOut(true, '', 'N');
  Move('FMFromSEC',move_dist);
 } 
 else{
  var move_dist = -445;
  Move('FMFromSEC',move_dist);
  grayOut(false, '', 'N');
 }
 
}

function FMToogleMoDelayed(time){
 setTimeout(FMToogleMo,time);  
}

function FMToogleMo(){
 var FMobj=document.getElementById('FMFromSEC');
 //alert(FMobj.offsetLeft);
 if(FMobj.offsetLeft < -439 ){
  var move_dist = 445;
  grayOut(true, '', 'N');
  Move('FMFromSEC',move_dist);
 }  
}     

function grayOut(vis, options, extra) {
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout 
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {}; 
  var zindex = options.zindex || 199;
  var opacity = options.opacity || 60;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page		
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars            
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
		
	var msgnode = document.createElement('div');           // Create the box layer.
		msgnode.style.position='fixed';                 // Position fixed
        msgnode.style.display='none';                      // Start out Hidden
        msgnode.id='box';                   				// Name it so we can find it later
		// give it a size and align it to center
		msgnode.style.width = "300px";
		msgnode.style.height = "300px";
		msgnode.style.marginLeft= "-150px";      
		msgnode.style.marginTop= "-150px"; 
		msgnode.style.textAlign = 'center';
		msgnode.style.top= "50%";                           // In the top	
		msgnode.style.left="50%";                          // Left corner of the page	
	  //tbody.appendChild(msgnode);                            // Add it to the grey screen
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height 
    
    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
        var pageWidth = document.body.scrollWidth+'px';
        var pageHeight = document.body.scrollHeight+'px';
    } else if( document.body.offsetWidth ) {
      var pageWidth = document.body.offsetWidth+'px';
      var pageHeight = document.body.offsetHeight+'px';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }   
    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;                      
    dark.style.MozOpacity=opaque;                   
    dark.style.filter='alpha(opacity='+opacity+')'; 
    dark.style.zIndex=zindex;        
    dark.style.backgroundColor=bgcolor;  
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';  
	if(extra == 'Y')
		document.body.style.overflow =  'hidden';
		
	//document.getElementById("box").style.zIndex = zindex+10;
	//document.getElementById("box").style.border = "#000 solid 1px";
	//document.getElementById("box").style.display = "block";
		

	document.getElementById("darkenScreenObject").onclick = function() //attach a event handler to hide both div
	{
	  FMToogle();
		//dark.style.display="none";
		//document.getElementById("FMFromSEC").style.display = "none";
		//document.body.style.overflow = 'auto';
		
	}
	//document.getElementById("box").style.backgroundColor="#FFF";  
	//document.getElementById("box").innerHTML = "This is a box. Click me to exit effect.";  
  
  document.onkeypress=document.onkeydown = function(evt) {  
  evt = evt || window.event;
  var FMobj=document.getElementById('FMFromSEC');
  var kc = evt.which || evt.keyCode;
    if (kc==27) {       
       FMToogle(); // TODO synchronizing all events to avoid earlier call while animation is not finished
    } 
  }
  
  } else {
     dark.style.display='none';
     
     document.onkeypress=document.onkeydown = function(evt) {  
     //var FMobj=document.getElementById('FMFromSEC');
     evt = evt || window.event;
     var kc = evt.which || evt.keyCode;
       if (kc==27) {                        
         
       } 
     }
  }
}