/***************************/
//@Author: Adrian "yEnS" Mato Gondelle
//@website: www.yensdesign.com
//@email: yensamg@gmail.com
//@license: Feel free to use it, but keep this credits please!					
/***************************/

//SETTING UP OUR POPUP
//0 means disabled; 1 means enabled;
var popupStatus = 0;

//loading popup with jQuery magic!
function loadPopup(background, popup){
	//loads popup only if it is disabled
	if(popupStatus==0){
		$(background).css({
			"opacity": "0.7"
		});
		$(background).fadeIn("fast");
		$(popup).fadeIn("fast");
		popupStatus = 1;
	}
}

//disabling popup with jQuery magic!
function disablePopup(background, popup) {
	$(background).fadeOut("fast");
	$(popup).fadeOut("fast");
	popupStatus = 0;
}

//centering popup
function centerPopup(background, popup) {
	//request data for centering
	var windowWidth = document.documentElement.clientWidth;
	var windowHeight = document.documentElement.clientHeight;
	//var windowScrollTop = document.documentElement.scrollTop;
	//var windowScrollLeft = document.documentElement.scrollLeft;
	var scrollpos = getScrollingPosition();
	var windowScrollTop = scrollpos[1];
	var windowScrollLeft = scrollpos[0];
	var popupHeight = $(popup).height();
	var popupWidth = $(popup).width();
	
	//centering
	$(popup).css({
		"position": "absolute",
		"top": windowHeight / 2 - popupHeight / 2 + windowScrollTop,
		"left": windowWidth / 2 - popupWidth / 2 + windowScrollLeft
	});
	//only need force for IE6

	$(background).css({
		"height": windowHeight
	});

}

//http://www.sitepoint.com/article/javascript-from-scratch/6/
function getScrollingPosition() {
	var position = [0, 0];

	if (typeof window.pageYOffset != 'undefined') {
		position = [
       window.pageXOffset,
       window.pageYOffset
   ];
	}

	else if (typeof document.documentElement.scrollTop
     != 'undefined' && document.documentElement.scrollTop > 0) {
		position = [
       document.documentElement.scrollLeft,
       document.documentElement.scrollTop
   ];
	}

	else if (typeof document.body.scrollTop != 'undefined') {
		position = [
       document.body.scrollLeft,
       document.body.scrollTop
   ];
	}

	return position;
}