var Overlay=Class.create({current_options:null,holder:null,background:null,holder_shown:false,bckg_shown:false,hiding_in_progress:false,hide_timer:null,click_event_handler:null,window_events_handler:null,content_parent_element:null,content_element:null,init:function(){if(this.holder){return}this.holder=this.init_holder();this.background=this.init_background();Element.extend(document);Element.extend(document.documentElement)},init_holder:function(){var b=document.createElement("div");Element.extend(b);b.identify();b.style.position="absolute";var a=this.option("opacity");if(a){b.setOpacity(a)}b.hide();document.body.appendChild(b);return b},position_holder:function(d){var c=this.holder;var b=c.getDimensions();if(Prototype.Browser.Opera){var f={width:window.innerWidth,height:window.innerHeight}}else{var f=document.viewport.getDimensions()}var e=document.viewport.getScrollOffsets();var a=this.option("position");c.style.left=(f.width-b.width)/2+e.left+"px";if(this.option("auto_reposition")||d){if(a=="center"){c.style.top=(f.height-b.height)/2+e.top+"px"}else{if(a=="top"){c.style.top=e.top+"px"}else{if(a=="bottom"){c.style.top=f.height-b.height+e.top+"px"}else{throw"Unsupported position: "+a}}}}else{if(a=="center"){c.style.top=(f.height-b.height)/2+"px"}else{if(a=="top"){c.style.top="0px"}else{if(a=="bottom"){c.style.top=f.height-b.height+"px"}else{throw"Unsupported position: "+a}}}}},init_background:function(){var b=document.createElement("div");Element.extend(b);b.style.position="absolute";b.style.left=0;b.style.top=0;b.style.backgroundColor="#000";var a=this.option("bckg_opacity");if(a){b.setOpacity(a)}b.hide();document.body.appendChild(b);return b},position_and_size_background:function(){var e=document.documentElement.getDimensions();var b=document.documentElement.cumulativeOffset();var f=document.viewport.getDimensions();var d=document.viewport.getScrollOffsets();var c=Math.max(e.width+b.left,f.width+d.left);var a=Math.max(e.height+b.top,f.height+d.top);this.background.style.width=c+"px";this.background.style.height=a+"px";this.background.style.left=0;this.background.style.top=0},update:function(a){this.holder.className=this.option("cls");this.holder.style.zIndex=this.option("z-index");this.background.style.zIndex=this.option("z-index")-1;this.restore_content_element();if(typeof a==typeof""){this.holder.update(a)}else{this.content_element=a;this.content_parent_element=a.parentNode;this.holder.update(null);this.holder.appendChild(a)}this.position_holder(true);if(this.option("modal")){this.background.className=this.option("bckg_cls");this.position_and_size_background()}},

show:function(d,b){Overlay.instances.push(this);this.current_options=b;this.clear_hide_timer();
//$$("select").each(function(h){h.setStyle({visibility:"hidden"})});

this.init();this.update(d);this.start_handling_window_events();$$("#"+this.holder.id+" select").each(function(h){h.setStyle({visibility:"visible"})});var a=this.option("beforeshow");if(a){a(this)}if(this.option("animate")){var g=this.option("animation_duration");var e=this.show_animation_options(false);if(this.holder_shown){new Effect.Opacity(this.holder,e)}else{this.holder.appear(e)}if(this.option("modal")){var f=this.show_animation_options(true);if(this.bckg_shown){new Effect.Opacity(this.background,f)}else{this.background.appear(f)}}else{this.background.fade(this.hide_animation_options(true))}var c=this;setTimeout(function(){c.complete_show()},g)}else{this.holder.show();this.option("modal")?this.background.show():this.background.hide();this.complete_show()}this.holder_shown=true;this.bckg_shown=Boolean(this.option("modal"))},complete_show:function(){var a=this.option("aftershow");if(a){a(this)}this.set_hide_timer();this.start_handling_click_events()},hide:function(){if(this.hiding_in_progress){return}this.hiding_in_progress=true;this.clear_hide_timer();this.stop_handling_click_events();if(this.option("animate")){var b=this.option("animation_duration");this.holder.fade(this.hide_animation_options(false));if(this.option("modal")){this.background.fade(this.hide_animation_options(true))}var a=this;setTimeout(function(){a.complete_hide()},b)}else{this.holder.hide();this.background.hide();this.complete_hide()}this.holder_shown=false;this.bckg_shown=false},complete_hide:function(){Overlay.instances=Overlay.instances.without(this);this.stop_handling_window_events();if(Overlay.instances.length==0){$$("select").each(function(b){b.setStyle({visibility:"visible"})})}else{$$("#"+Overlay.instances.last().holder.id+" select").each(function(b){b.setStyle({visibility:"visible"})})}this.clear_hide_timer();this.restore_content_element();var a=this.option("afterhide");if(a){a(this)}this.hiding_in_progress=false},start_handling_click_events:function(){if(!this.option("click_hide")){this.stop_handling_click_events();return}if(!this.click_event_handler){var a=this;this.click_event_handler=function(){a.hide()}}Event.observe(this.holder,"click",this.click_event_handler);Event.observe(this.background,"click",this.click_event_handler)},stop_handling_click_events:function(){Event.stopObserving(this.holder,"click",this.click_event_handler);Event.stopObserving(this.background,"click",this.click_event_handler)},start_handling_window_events:function(){var a=this;if(this.option("modal")){this.window_events_handler=function(){a.position_holder();a.position_and_size_background()}}else{this.window_events_handler=function(){a.position_holder()}}Event.observe(window,"resize",this.window_events_handler);Event.observe(window,"scroll",this.window_events_handler)},stop_handling_window_events:function(){Event.stopObserving(window,"resize",this.window_events_handler);Event.stopObserving(window,"scroll",this.window_events_handler)},set_hide_timer:function(){var a=this.option("auto_hide");var c=this.option("duration");if(a&&c){var b=this;this.hide_timer=setTimeout(function(){b.hide()},c)}},clear_hide_timer:function(){if(this.hide_timer){clearTimeout(this.hide_timer);this.hide_timer=null}},option:function(a){if(this.current_options&&this.current_options[a]!==undefined){return this.current_options[a]}if(Overlay.default_options[a]!==undefined){return Overlay.default_options[a]}return null},show_animation_options:function(a){return{duration:this.option("animation_duration")/1000,to:this.option(a?"bckg_opacity":"opacity")}},hide_animation_options:function(a){return{duration:this.option("animation_duration")/1000,from:this.option(a?"bckg_opacity":"opacity")}},restore_content_element:function(){if(this.content_element&&this.content_parent_element){this.content_parent_element.appendChild(this.content_element)}this.content_element=null;this.content_parent_element=null}});Object.extend(Overlay,{instances:[],valid_options:["cls","bckg_cls","opacity","bckg_opacity","position","z-index","click_hide","auto_hide","auto_reposition","duration","modal","animate","animation_duration","beforeshow","aftershow","afterhide"],default_options:{"z-index":9999,position:"center",click_hide:true,auto_hide:true,auto_reposition:true,duration:5000,animate:true,animation_duration:500,opacity:0.9,bckg_opacity:0.6},defaults:function(a){for(name in a){Overlay.default_options[name]=a[name]}},hide:function(c){for(var a=0,b=Overlay.instances.length;a<b;a++){if(Element.descendantOf(c,Overlay.instances[a].holder)){Overlay.instances[a].hide();break}}}});