/* FUNÇÃO QUE MOSTRA O QUADRO DE AJUDA

	AS PÁGINAS QUE FOREM UTILIZAR DEVEM CONTER A DIV
	<div style="display: none; background-color:#FFFFCC; border:solid #000000 1px; padding:10px; position: absolute;z-index:110; " id="preview_div"></div>
	
	E A CHAMADA DA DA FUNÇÃO NOS EVENTOS:
	
	*ONMOUSEOVER
		showtrail('CAMPO1','CAMPO2',CAMPO3,CAMPO4,'CAMPO5');"
		CAMPO1 = IMAGEM
		CAMPO2 = TITULO
		CAMPO3 = LARGURA
		CAMPO4 = ALTURA	
		CAMPO5 = TEXTO INFORMATIVO
	
	*ONMOUSEOUT
		hidetrail()
		OCULTA A JANELA DA AJUDA
*/
var offsetfrommouse=[15,25]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=0; //duration in seconds image should remain visible. 0 for always.

var defaultimageheight = 40;	// maximum image size.
var defaultimagewidth = 40;	// maximum image size.

var timer;

function gettrailobj(){
if (document.getElementById)
return document.getElementById("preview_div").style;
}

function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById("preview_div");
}


function truebody(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
}


function hidetrail(){	
	gettrailobj().display= "none";
	document.onmousemove="";
	gettrailobj().left="-500px";
	clearTimeout(timer);
}

function showtrail(imagename,title,width,height,texto){
	
	i = imagename;
	t = title;
	w = width;
	h = height;
	te = texto;
	timer = setTimeout("show('"+i+"',t,w,h,te);",10);
}
function show(imagename,title,width,height,texto){

	/*********************************************
	'VARIAVEIS RECEBE A POSIÇÃO XY DA PAGINA
	**********************************************/
	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth - offsetfrommouse[0];
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);

	//alert(docwidth);
	//alert(docheight);
	if( (navigator.userAgent.indexOf("Konqueror")==-1  || navigator.userAgent.indexOf("Firefox")!=-1 || (navigator.userAgent.indexOf("Opera")==-1 && navigator.appVersion.indexOf("MSIE")!=-1))) {

		( width == 0 ) ? width = defaultimagewidth: '';
		( height == 0 ) ? height = defaultimageheight: '';
			
		width+=30;
		height+=55;
		defaultimageheight = height;
		defaultimagewidth = width;
	
		document.onmousemove=followmouse; 
		
		newHTML = '<div style="width:'+  width +'px;height:'+ height +'px"><div id="loader_container"><div id="loader"><div align="center"></div><div id="loader_bg"><div id="progress"> </div></div></div></div>';
	
    	newHTML = newHTML + '<div><img  src="' + imagename + '" border="0"></div>';
		newHTML = newHTML + '</div>'; 
		
		/*if(navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Opera")==-1 ){
			newHTML = newHTML+'<iframe src="about:blank" scrolling="no" frameborder="0" width="'+width+'" height="'+height+'"></iframe>';
		}*/		
		//alert(newHTML);
		gettrailobjnostyle().innerHTML = newHTML;
		gettrailobj().display="block";
	}
}

function followmouse(e){


	var xcoord=offsetfrommouse[0];
	var ycoord=offsetfrommouse[1];

	
	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15;
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);
	//Se não for o internet explore
	if (typeof e != "undefined"){
		if (docwidth - e.pageX < defaultimagewidth + (2 * offsetfrommouse[0])){		
			xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
		} else {		
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < defaultimageheight + (2 * offsetfrommouse[1])){
			ycoord += e.pageY - Math.max(0,(2 * offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}
		gettrailobj().left=xcoord+"px";
		gettrailobj().top=ycoord+"px";		
	//Se for o internet explore
	} else if (typeof window.event != "undefined"){	
		if (docwidth - event.clientX < defaultimagewidth + (2 * offsetfrommouse[0])){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft + event.clientX;
		}
		if (docheight - event.clientY < (defaultimageheight + (2 * offsetfrommouse[1]))){		
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(2*offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
		} else {
			ycoord += ((truebody().scrollTop - 160)+ event.clientY);
		}
		gettrailobj().left=60+"px";
		gettrailobj().top=ycoord+"px";
	}

	


}