var cont_enters = 0;

jQuery.fn.modal = function(options){

	

	// VERIFICANDO O HREF

	if(!options){

		if(this.attr('href')) var options = { url: this.attr('href') };

	} else {

		if(!options.url)if(this.attr('href')) options.url = this.attr('href');

	}

	

	var settings = {

		url: '#',

		backgroundColor: '#000',

		backgroundOpacity: 0.6,

		position: 'center',

		referencePosition: this,

		top:0,

		left:0,

		closeEsc:true,

		closeClickOut: true,

		autoOpen: false

	};

	options = jQuery.extend(settings, options);

	

	

	function openModal(){
		
        cont_enters++;
		
		if(cont_enters > 1){
			return;	
		}
		/*CREATE ELEMENTS*/

		$('body').append($('<img />').attr({src: "includes/imgs/load.gif", width: 88, height: 78, alt: "", className: 'load'})).append($('<div></div>').addClass('bg_modal')).append($('<div></div>').addClass('view_modal'));

		

		// verificando se o body é menor do que o screen

		var altura = $('html')[0].scrollHeight < $(window).height() ? $(window).height() : $('html')[0].scrollHeight;

		$('.bg_modal').width($('html')[0].scrollWidth).height(altura);

		

		/*OPACITY*/

		if(options.backgroundOpacity != 0){

			$('.bg_modal').css('background-color',options.backgroundColor);

			$('.view_modal').css('opacity', 0);

			$('.bg_modal').css('opacity', 0);

		}

		

		// escondendo selects

		$('select').css('visibility', 'hidden');



		// posicionamento

		if(options.position=='relative'){

			var offset  = options.referencePosition.offset();

			leftModal = offset.left;		

			topModal =  offset.top;		

		}

		

		/*SHOW BACKGROUND*/

		$('.bg_modal').fadeTo('fast', options.backgroundOpacity, function() {

			$('.view_modal').load(options.url,{nocacheattr:(new Date()).getTime()}, function() {

			

				/*REMOVE LOAD*/

				$('.load').remove();

				

				GB_getPageScrollTop = function() {

					var yScrolltop;

					if (self.pageYOffset) {

						yScrolltop = self.pageYOffset;

					} else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft) {

						yScrolltop = document.documentElement.scrollTop;

					} else if (document.body) {

						yScrolltop = document.body.scrollTop;

					}

					return yScrolltop;

				}

				

				/*CENTRALIZE MODAL*/

				if(options.position!='center'){

					var alturaModal = parseInt(options.top) + parseInt(topModal) + parseInt($('.view_modal').height());

					if(altura<alturaModal){

						options.top = 0;

						topModal = altura - parseInt($('.view_modal').height());

					}					

					$('.view_modal').css({

							marginTop: topModal, 

							marginLeft: leftModal,

							left: options.left,

							top: options.top

						}

					);

					

				} else {

					$('.view_modal').css({marginTop: parseInt(GB_getPageScrollTop() - ($('.view_modal').height()/2)), marginLeft: -parseInt($('.view_modal').width()/2)});

				}



				/*MODAL HIDE*/

				if(options.backgroundOpacity != 0) $('.view_modal').fadeTo('fast', 1);



				/*CLOSE MODAL*/

				$("a[rel='modalclose']").click(function() {

					closeModal();

					return false;

				})

			});

		});		

		

		

		if(options.closeClickOut==true){

			$('.bg_modal').click(function(){

				closeModal();

			});

		}

		



		if(options.closeEsc==true){

			$(window).keydown(function(event){

				if(event.keyCode==27)closeModal();

			});

		}

		return false;

	}

	





	if(options.autoOpen == false){
		
		this.click(openModal);	

	} else {

		openModal();

	}

	

	

	

	

	/*CLOSE MODAL*/

	function closeModal(){
		
		cont_enters = 0;
		
		/*HIDE MODAL*/

		$('.view_modal').fadeTo('fast', 0, function(){$(this).remove();});

		

		/*HIDE BACKGROUND*/

		$('.bg_modal').fadeTo('fast', 0, function() {

			$(this).remove();

			$('select').css('visibility', 'visible');

		});

		

		$(window).unbind();

		$('.bg_modal').unbind();

	}	



	

	this.css('visibility','visible');

};



/*$(document).ready(function(){



});*/