var ie6 = (navigator.userAgent.indexOf("MSIE 6")!= -1);
var ie8 = (navigator.userAgent.indexOf("MSIE 8")!= -1);

function Popup(args){
	var me = this;
	this.idPopup = (args.idPopup)?args.idPopup:'dialog';
	this.conteudo = (args.conteudo)?args.conteudo:'';
	this.Fixed = args.Fixed;
	this.fade = args.fade;
	this.Top = args.Top;
	this.Left = args.Left;
	this.posRelScroll = args.posRelScroll;
	this.mask = args.mask;
	this.zIndex = args.zIndex?args.zIndex:99;
	this.onOpen = args.onOpen;
	this.onClose = args.onClose;
	this.closeToEsc = args.closeToEsc;
	this.idMask = (args.idMask)?args.idMask:'popup-mask';
	this.maskColor = (args.maskColor)?args.maskColor:'#000';
	this.maskOpacity = (args.maskOpacity)?args.maskOpacity:0.7;
	
	this.criaElementos = function(){
		if(me.mask){
			me.objMask = $(document.createElement('div'));
			me.maskColor = (args.maskColor)?args.maskColor:'#000';
			me.objMask.attr('id',me.idMask);
			me.objMask.css({
				"display":"none",
				"position":"absolute",
				"background":me.maskColor,
				"top":'0',
				"left":'0',
				"z-index":(parseInt(me.zIndex)-1)
			});	
		}
		me.objPop = $(document.createElement('div'));
		me.objPop.attr('id',me.idPopup);
		me.posicao = "fixed";
		me.objPop.css({
			"z-index":me.zIndex,
			"display":"none"
		});
		if(me.objMask){
			$(document).find('body').append(me.objMask);
		}
		$(document).find('body').append(me.objPop);
	}
	var FadeTo = function(obj,vel,opac,callBack){
		obj.css("display","block");
		obj.animate({opacity: opac}, vel,callBack) 
	}
	this.posiciona = function(){
		if(!me.Top){
			me.Top = ((winH-me.objPop.height())/2);
		}
		if(!me.Left){
			me.Left = ((winW-me.objPop.width())/2);
		}
		if(me.objPop.height() > winH){
			me.Top =10;
		}
		if(me.Fixed){
			var posicao = (ie6)?"absolute":"fixed";
			if(ie6){						
				$(window).scroll(function(){
					me.objPop.css("top", (topo+$(window).scrollTop())+"px");
				});
			}
			me.objPop.css({
				"position":posicao,
				"top":me.Top+"px",		  
				"left":me.Left+"px"		
			});
		}else{
			var Top = me.Top;
			var Left = me.Left;	
			if(me.posRelScroll){
				Top += $(window).scrollTop();
				Left += $(window).scrollLeft();	
			}
			if ((Top+me.objPop.height()) > docHeight){
				Top -= ((Top+me.objPop.height())-docHeight)+30;
			}
			me.objPop.css({
				"position":"absolute",
				"top":Top+"px",		  
				"left":Left+"px"		
			});	
		}
		var onReadyShow = function(){
			if(args.bt_close){
				me.bt_close = $(args.bt_close);
				me.bt_close.click(me.close);
			}
			if(me.onOpen)
				me.onOpen();
		}
		if(me.fade){
			me.objPop.fadeIn(500,onReadyShow);	
		}else{
			me.objPop.css('display','block');	
			onReadyShow();
		}
	}
	this.open = function(conteudo){			
		docHeight = $(document).height();
		docWidth = $(document).width();	
		winH = $(window).height();
		winW = $(window).width();
		me.criaElementos();
		var conteudo = (conteudo)?conteudo:me.conteudo;	
		var mostrarPop = function(){
			me.objPop.html("").append(conteudo);	
			if(me.objPop.find("img").length > 0){
				me.objPop.find("img").ready(function(){
					me.posiciona();
				})
			}else{
				me.posiciona();	
			}
		}
		if(me.mask){
			docWidth = (ie8 || ie6)?docWidth-22:docWidth;
			me.objMask.css({
				'width':docWidth,
				'height':docHeight,
				opacity: 0.0				
			});	
			FadeTo(me.objMask,400,me.maskOpacity,mostrarPop);
		}else{
			mostrarPop();	
		}		
	}
	this.close = function(){
		if(me.fade){
			me.objPop.fadeOut(300,function(){
				if(me.mask){
					me.objMask.fadeOut(500,function(){
						me.objPop.remove();
						me.objMask.remove();	
					});
				}else{
					me.objPop.remove();
				}	
			});						
		}else{
			me.objPop.css('display','none');	
			if(me.mask){
				me.objMask.fadeOut(500,function(){
					me.objPop.remove();
					me.objMask.remove();	
				});
			}else{
				me.objPop.remove();
			}	
		}		
		if(me.onClose){
			me.onClose();
		}
	}
	var pressedKey = function(e){
		if(!e){
			if(window.event){
				e = window.event;
			}else{
				return;
			}
		}
		if(typeof(e.keyCode) == 'number'){
			e = e.keyCode;
		}else if( typeof( e.which ) == 'number' ){
			e = e.which;
		} else if( typeof( e.charCode ) == 'number'  ){
			e = e.charCode;
		}else{
			return;
		}
		if(e==27){
			me.close();
		}
	}
	if(me.closeToEsc){
		document.onkeyup = pressedKey;
	}
}