var busy=0;
function popup_show(src,w,h){
	document.getElementById('popup_loading').style.visibility='hidden';
	document.getElementById('popup_pic').style.marginLeft='0px';
	document.getElementById('popup_pic').style.marginTop='0px';
	if(src!=''){
		document.getElementById('popup_pic').style.backgroundImage='url('+src+')';
	} else {
		document.getElementById('popup_pic').style.backgroundImage='none';
	};
	if((w+50)<=document.body.clientWidth){
		document.getElementById('popup_wrap').style.width=w+'px';
		document.getElementById('popup_next').style.marginLeft=w-80+'px';
	} else {
		document.getElementById('popup_wrap').style.width=document.body.clientWidth-50+'px';
		document.getElementById('popup_next').style.marginLeft=document.body.clientWidth-50-80+'px';
	};
	if((h+50)<=document.body.clientHeight){
		document.getElementById('popup_wrap').style.height=h+'px';
		document.getElementById('popup_next').style.marginTop=Math.floor(h/2)-80+'px';
		document.getElementById('popup_prev').style.marginTop=Math.floor(h/2)-80+'px';
	} else {
		document.getElementById('popup_wrap').style.height=document.body.clientHeight-50+'px';
		document.getElementById('popup_next').style.marginTop=Math.floor(document.body.clientHeight/2)-80+'px';
		document.getElementById('popup_prev').style.marginTop=Math.floor(document.body.clientHeight/2)-80+'px';
	};
	document.getElementById('popup_pic').style.width=w+'px';
	document.getElementById('popup_pic').style.height=h+'px';
	if((w+50)>document.body.clientWidth || (h+50)>document.body.clientHeight){
		document.getElementById('popup_pic').style.cursor='move';
		document.getElementById('popup_pic').title='Перетащите картинку';
	};
	if(document.getElementById('popup_frame').style.visibility=='hidden'){
		busy=1;
		document.getElementById('popup_frame').style.visibility='visible';
		t=new OpacityTween(document.getElementById('popup_frame'),Tween.strongEaseOut, 0, 100, 1);
		var a = new Object();
		a.onMotionFinished = function(){
			busy=0;
		};
		t.addListener(a)
		t.start();
	};
};
function popup(src,slide,w,h){
	document.getElementById('popup_loading').style.visibility='visible';
	xajax_popup(src,slide,w,h);
	if(busy!=1 && document.getElementById('popup').style.visibility=='hidden'){
		busy=1;
		document.getElementById('popup').style.visibility='visible';
		t=new OpacityTween(document.getElementById('popup'),Tween.strongEaseOut, 0, 100, 1);
		var a = new Object();
		a.onMotionFinished = function(){
			busy=0;
		};
		t.addListener(a)
		t.start();
	};
};
function popup_hide(){
	if(busy!=1){
		prev_url='';
		next_url='';
		busy=1;
		t=new OpacityTween(document.getElementById('popup'),Tween.strongEaseOut, 100, 0, 1);
		var a = new Object();
		a.onMotionFinished = function(){
			document.getElementById('popup_content').innerHTML='';
			document.getElementById('popup').style.visibility='hidden';
			busy=0;
		};
		t.addListener(a)
		t.start();
	};
};

var x=null;
var y=null;
var e=null;
function popup_drag_start(event){
	if(event.srcElement){e=event.srcElement;} else {e=event.target;};
	if(e.id!='popup_pic'){return false;};
	x=event.clientX-(e.parentNode.offsetLeft+e.offsetLeft);
	y=event.clientY-(e.parentNode.offsetTop+e.offsetTop);
	return false;
};
function popup_drag(event){
	if(e==null || x==null || y==null || e.id!='popup_pic'){return false;};
	if((event.clientX-e.parentNode.offsetLeft-x)>0){
		e.style.marginLeft='0px';
	} else if((event.clientX-e.parentNode.offsetLeft-x)<(e.parentNode.offsetWidth-e.offsetWidth)){
		e.style.marginLeft=e.parentNode.offsetWidth-e.offsetWidth+'px';
	} else {
		e.style.marginLeft=event.clientX-e.parentNode.offsetLeft-x+'px';
	};
	if((event.clientY-e.parentNode.offsetTop-y)>0){
		e.style.marginTop='0px';
	} else if((event.clientY-e.parentNode.offsetTop-y)<(e.parentNode.offsetHeight-e.offsetHeight)){
		e.style.marginTop=e.parentNode.offsetHeight-e.offsetHeight+'px';
	} else {
		e.style.marginTop=event.clientY-e.parentNode.offsetTop-y+'px';
	};
	return false;
};
function popup_drag_end(){
	x=null;
	y=null;
	e=null;
	return false;
};
var prev_url='';
var next_url='';
document.onkeydown = function(event){
    event = event || window.event;
    var keycode = event.charCode || event.keyCode;
    if(keycode === 27){
        popup_hide();
    } else if(keycode === 37 && prev_url!=''){
		popup(prev_url,1);
    } else if(keycode === 39 && next_url!=''){
		popup(next_url,1);
    };
};