var is_DHTML=window.Event?true:false;
	var Y_pos = 1;
	var X_pos = 1;
	var c = 0;
	
	function zjisti_pozici(evnt)
	{
		
		
		 if (!evnt) evnt = window.event; // works on IE, but not NS (we rely on NS passing us the event)

  if (evnt)
  { 
    if (evnt.pageX || evnt.pageY)
    { // this doesn't work on IE6!! (works on FF,Moz,Opera7)
      X_pos = evnt.pageX;
      Y_pos = evnt.pageY;
      algor = '[evnt.pageX]';
      if (evnt.clientX || evnt.clientY) algor += ' [evnt.clientX] '
    }
    else if (evnt.clientX || evnt.clientY)
    { // works on IE6,FF,Moz,Opera7
      X_pos = evnt.clientX + document.body.scrollLeft;
      Y_pos = evnt.clientY + document.body.scrollTop;
      algor = '[evnt.clientX]';
      if (evnt.pageX || evnt.pageY) algor += ' [evnt.pageX] '
    }  
  }
		
		
		
		
		
		
		//X_pos=evnt.pageX;
		//Y_pos=evnt.pageY;
		
//		if (is_DHTML && (navigator.userAgent.indexOf("Opera")== -1)) {
//		   	if (evnt.pageX){
//		      		X_pos=evnt.pageX;
//		      		Y_pos=evnt.pageY;
//		      		
//		    	}
//	  	}
//	  	else{
//	    		
//	  		scroll_top=0;
//	  		if (document.documentElement && document.documentElement.scrollTop)
//				scroll_top = document.documentElement.scrollTop;
//			else if (document.body)
//				scroll_top = document.body.scrollTop
//				
//			scroll_left=0;
//	  		if (document.documentElement && document.documentElement.scrollLeft)
//				scroll_left = document.documentElement.scrollLeft;
//			else if (document.body)
//				scroll_left = document.body.scrollLeft
//	  		
//			X_pos=(event.clientX + scroll_left);
//	    	Y_pos=(event.clientY + scroll_top);
//	  	}
	      	
	      	
	}
	
	function potvrzeni(COUNT_ID, URL, BUTTON_TEXT, LANG){
		zatemneni();
		
		text = '';
		odkaz_zavrit = '<a href="#" style="text-decoration: none; padding: 0px; color: white;" onclick="potvrzeni_zavrit(); zavrit_overlay(); return false;"><img src="./images/btn_close.png" /></a>';
		document.getElementById('potvrzeni_id').className = 'potvrzeni_visible';
		
		text = text + '<p style="padding: 0px; padding-bottom: 3px; margin: 0px; width: 100%; text-align: right;">'+odkaz_zavrit+'</p>';
		
		text = text + '<p style="padding: 0px; font-weight: bold; padding-left: 60px;">'+LANG+'</p>';
		
		//text = text + '<p style="padding-top: 0px; width: 100%; text-align: right; border: 1px solid red;">';
		text = text + '<form action="'+URL+'" method="post" style="padding-top: 5px; width: 100%; text-align: right;">';
		text = text + '<input type="text" name="quantity" class="add" value="'+document.getElementById(COUNT_ID).value+'" style="border: 0px;" />&nbsp;&nbsp;'
		text = text + '<input type="submit" name="add" value="'+BUTTON_TEXT+'" />';
		text = text + '</form>';
		//text = text + '</p>';
		document.getElementById('potvrzeni_id').innerHTML = text;
		document.getElementById('potvrzeni_id').style.top=(Y_pos - 80)+'px';
		document.getElementById('potvrzeni_id').style.left=(X_pos - 170)+'px';
		
		return false;
	}
	
	function potvrzeni_zavrit(){
		document.getElementById('potvrzeni_id').innerHTML = '';
		document.getElementById('potvrzeni_id').className = 'potvrzeni_invisible';
	}
	
	// Test zatemneni obrazovky
	function zatemneni() {
		
		var objBody = document.getElementsByTagName("body").item(0);
		var objOverlay = document.createElement("div");
		
		defMaxWidth=document.width;//mozilla
		if (document.body.clientWidth){
			defMaxWidth=document.body.clientWidth;//ie, mozilla
		}
		if(window.opera){
			//defMaxWidth=window.innerWidth;//opera
			defMaxWidth=document.body.scrollWidth;//opera
		}
			
		defMaxHeight=document.height;//mozilla
		if (document.body.clientHeight){
			defMaxHeight=document.body.clientHeight;//ie, mozilla
		}
		if(window.opera) {
			//defMaxHeight=window.innerHeight;//opera
			defMaxHeight=document.documentElement.clientHeight;//opera
		}
		
		
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.background='#333333';
		objOverlay.style.position='absolute';
		objOverlay.style.width=defMaxWidth+'px';
		objOverlay.style.height=defMaxHeight+'px';
		objOverlay.style.top='0px';
		objOverlay.style.left='0px';
		objOverlay.style.opacity='0.7';	
		objOverlay.style.filter='alpha(opacity=70)';	
		
		
		objOverlay.onclick = zavrit_overlay;
		objBody.appendChild(objOverlay);
	}
	
	function zavrit_overlay(){
		var objBody = document.getElementsByTagName("body").item(0);
			var objOverlay = document.getElementById('overlay');
			objBody.removeChild(objOverlay);
			potvrzeni_zavrit();
	}
	
	document.onmousemove = zjisti_pozici;