/*********
	atxt.js
	

	Taken from abc site with navtxt replaced by popup_text
	
	vers 1 AJM 17/01/2006 Extended version of ALTTXT
*/


/*********************************************************************************************

ALTTXT V1.6
BY: BRIAN GOSSELIN OF SCRIPTASYLUM.COM

with amendments by 
Hilary Forbes of DMR Limited

INSTRUCTIONS:

1: PUT THESE DIVS IN THE END OF THE BODY AREA:

   <div id="somename" class="someclass" style="visibility:hidden; position:absolute; top:0px; left:-400px; padding:10px"></div>

2: NEXT, DEFINE the above someclass in your stylesheet

3: THEN, SET THE 6 SETTINGS BELOW ( dofade, centertext, xoffset, yoffset, mousefollow, and hideDelay ) AS DESIRED.

4: LASTLY ADD THE MOUSEOVER/MOUSEOUT EVENT HANDLERS TO EACH LINK THAT YOU WANT THIS EFFECT FOR:

     EXAMPLE: 
	 print "<a href=# onMouseOver=getText('popup_txt','http://" ENVIRON[HTTP_HOST] progcall "&mode=getText') onMouseOut=\"javascript:writetxt(0);\">Move mouse over this<br></a>"


NOTES:

  > YOU CAN CAUSE A BOX *NOT* TO DISAPPEAR ONCE THE MOUSE LEAVES THE LINK BY SIMPLY OMITTING THE
    onmouseout="writetxt(0)" PART. THIS WILL CAUSE THE CURRENT BOX TO REMAIN VISIBLE. THIS IS BEST
    USED WHEN mousefollow MODE IS DISABLED (SET TO false).

  > YOU CAN SET THE PADDING STYLE ATTRIBUTE *ONLY* IN THE popup_txt DIV ITSELF AND *NOT* IN THE STYLE
    SHEET AT THE TOP OF THE PAGE. OTHERWISE NS4 DISPLAYS SOME WEIRD BEHAVIOR. ALSO, THE PADDING ATTRIBUTE
    ONLY HAS AN EFFECT IN IE4+ AND NS6+.

*********************************************************************************************/


////////////////////////////// NO NEED TO EDIT BEYOND THIS POINT //////////////////////////////////////

// Define the object prototype defaults
// Setup the object properties
altObject.prototype.w_y=0;
altObject.prototype.w_x=0;
altObject.prototype.popup_txt=null;
altObject.prototype.boxheight=0;
altObject.prototype.boxwidth=0;
altObject.prototype.ishover=false;
altObject.prototype.ieop=0;
altObject.prototype.op_id=0;
altObject.prototype.oktomove=false;
altObject.prototype.dy=0;
altObject.prototype.posvary='';

// DEFAULTS BELOW or specify your own after creating the object
altObject.prototype.dofade=false;       // enables fade-in effect (for ie4+ and ns6/firefox only.  not opera)

altObject.prototype.centertext=false;  	// centers the text inside the box. you can't simply do this via "style" because of ns4.
					  					// otherwise, text is left-justified.

altObject.prototype.xoffset= new Number(30);         // horizontal pixel count from cursor

altObject.prototype.yoffset= new Number(10);        	// vertical pixel count from cursor

// Functions below will need testing if altered
altObject.prototype.mousefollow=false; 	// enables mouse follow mode where the box continues to follow the mouse. set to false to
					   					// lock the box wherever it initially appears.

altObject.prototype.hideDelay=1;      	// delay in milliseconds ( 1 second = 1000 milliseconds) from when you hover out of link
					   					// and the box disappears only when "mousefollow" is set to "false".
										// this will give the user time to click a link or whatever in the box before it disappears.

var isLoaded=false;

function altObject(name,posvary,disable_mouseout) {
// Finish creating the object
	this.popup_txt=(js_ns4)?document.layers[name]:(js_ie4)?document.all[name]:(js_w3c)?document.getElementById(name):null;
	this.posvary = posvary;
	this.getBoxWidth();
	this.getBoxHeight();
	this.getWindowDims();
	if(js_ie4||js_ie5&&this.dofade)this.popup_txt.style.filter="alpha(opacity=100)";
	this.popup_txt.onmouseover=function() {
		if(!this.mousefollow)clearTimeout(this.dy);
	}
	if (!disable_mouseout) {
		this.popup_txt.onmouseout=function() {
			if(!this.mousefollow)this.dy=setTimeout('this.hideAltTxt()',this.hideDelay);
		}
	}
	window.onresize=this.getWindowDims;
	isLoaded=true;
	if (parent.isloaded==false && do_onload()) do_onload();
}

altObject.prototype.toggleCenterText=function () {
	this.centertext=!this.centertext;
}

altObject.prototype.toggleMouseFollow=function () {
	this.mousefollow=!this.mousefollow;
}

altObject.prototype.toggleDoFade=function () {
	this.dofade=!this.dofade;
	if(!this.dofade)this.ieop=100;
}

altObject.prototype.getWindowDims=function () {
	this.w_y=(js_ie5||js_ie4)?document.body.clientHeight:window.innerHeight;
	this.w_x=(js_ie5||js_ie4)?document.body.clientWidth:window.innerWidth;
}

altObject.prototype.getBoxWidth = function () {
	if(js_ns4)this.boxwidth=(this.popup_txt.document.width)? this.popup_txt.document.width : this.popup_txt.clip.width;
	else{
		if(js_ie4)this.boxwidth=(this.popup_txt.style.pixelWidth)? this.popup_txt.style.pixelWidth : this.popup_txt.offsetWidth;
		else this.boxwidth=(this.popup_txt.style.width)? parseInt(this.popup_txt.style.width) : parseInt(this.popup_txt.offsetWidth);
	}
}
/*********************************************************************************************
error somewhere in the section above - editplus identifies it as character 6?
*********************************************************************************************/

altObject.prototype.getBoxHeight=function () {
	if(js_ns4)this.boxheight=(this.popup_txt.document.height)? this.popup_txt.document.height : this.popup_txt.clip.height;
	else{
		if(js_ie4)this.boxheight=(this.popup_txt.style.pixelHeight)? this.popup_txt.style.pixelHeight : this.popup_txt.offsetHeight;
		else this.boxheight=parseInt(this.popup_txt.offsetHeight);
	}
}

altObject.prototype.movePopupTxt=function (x,y) {
	if (js_debug) jsLog.Info('Move box to x='+ x + ' y='+ y);
	if(js_ns4)this.popup_txt.moveTo(x,y);
	else{
		this.popup_txt.style.left=x+'px';
		this.popup_txt.style.top=y+'px';
	}
}

altObject.prototype.getPageScrollY=function () {
	if(js_ie5||js_ie4)return (document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
	else return window.pageYOffset;
}

altObject.prototype.getPageScrollX=function () {
	if(js_ie5||js_ie4)return (document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;
	else return window.pageXOffset;
}

altObject.prototype.writeInDiv=function (text)	{
	if(js_ns4){
		this.popup_txt.document.open();
		this.popup_txt.document.write(text);
		this.popup_txt.document.close();
	}else this.popup_txt.innerHTML=text;
}

altObject.prototype.writeTxt=function (text) {
	if (isLoaded!=true) return;
	if (js_debug) jsLog.Info('x=' + this.xoffset + 'y=' + this.yoffset);
	if(this.dofade && (js_ie4||js_w3c))clearInterval(this.op_id);
	if(text!=0) {
		if(!this.mousefollow) {
			clearTimeout(this.dy);
		}
		this.oktomove=true;
		this.ishover=true;
		if(js_ns4)text='<div class="navtext">'+((this.centertext)?'<center>':'')+text+((this.centertext)?'</center>':'')+'</div>';
		if(js_w3c||js_ie4)this.popup_txt.style.textAlign=(this.centertext)?"center":"left";
		this.writeInDiv(text);
		writingText=true;
		if(js_ns4)this.popup_txt.visibility="show";
		else{
			this.popup_txt.style.visibility="visible";
			this.popup_txt.style.display="block";
		}
		this.getBoxHeight();
		this.moveObj();
		writingText=false;
		if((js_w3c||js_ie4) && this.dofade) {
			if(js_ie4||js_ie5)this.popup_txt.style.filter="alpha(opacity=0)";
			if(js_ns6)this.popup_txt.style.MozOpacity=0;
			this.ieop=0;
			this.op_id=setInterval('this.increaseOpacity()',50);
		}
	}else{
		this.hideAltTxt();
		/**
		if(this.mousefollow)this.hideAltTxt();
		else this.dy=setTimeout(hideATxt(this),this.hideDelay);
		**/
	}
}

altObject.prototype.hideAltTxt=function () {
	if(js_ns4)this.popup_txt.visibility="hide";
	else{
		this.popup_txt.style.display="none";
		this.popup_txt.style.visibility="hidden";
	}
	this.writeInDiv('');
}

altObject.prototype.increaseOpacity=function () {
	if(this.ieop<=100) {
		this.ieop+=7;
		if(js_ie4||js_ie5)this.popup_txt.style.filter="alpha(opacity="+this.ieop+")";
		if(js_ns6)this.popup_txt.style.MozOpacity=this.ieop/100;
	}else clearInterval(this.op_id);
}

altObject.prototype.moveObj=function () {
//	if (writingText==true) {
		if(this.ishover && this.oktomove ) {
			if ( this.posvary!='fixed') {
//				mx=(js_ie5||js_ie4)?event.clientX:evt.pageX;
//				my=(js_ie5||js_ie4)?event.clientY:evt.pageY;
//				if (js_debug)  jsLog.Info('cursor at ' + mx + "," + my);
				margin=(js_ie4||js_ie5)?5:25;
				if(js_ns6)if(document.height+27-window.innerHeight<0)margin=15;
				if(js_ns4)if(document.height-window.innerHeight<0)margin=10;
				if(js_ns4||js_ns6)mx-=this.getPageScrollX();
				if(js_ns4)my-=this.getPageScrollY();
				xoff= mx + parseInt(this.xoffset);
				yoff=(my+this.boxheight+parseInt(this.yoffset)-((js_ns6)?this.getPageScrollY():0)>=this.w_y)? -5-this.boxheight-parseInt(this.yoffset): parseInt(this.yoffset);
				this.movePopupTxt( Math.min(this.w_x-this.boxwidth-margin , Math.max(2,xoff))+this.getPageScrollX(), my+yoff+((!js_ns6)?this.getPageScrollY():0));
				if(!this.mousefollow)this.oktomove=false;
			}
		}
//	}else{
//		mx=(js_ie5||js_ie4)?event.clientX:evt.pageX;
//		my=(js_ie5||js_ie4)?event.clientY:evt.pageY;
//	}
}