// JavaScript Document
function FullPhotoWindow(imageName,imageWidth,imageHeight,alt,bgcolor,hugger,hugMargin) {

	if (bgcolor=="") {
		bgcolor="#FFFFFF";
	}
	var adj=10
	var w = screen.width;
	var h = screen.height;
	var byFactor=1;

	if(w<740){
	  var lift=0.90;
	}
	if(w>=740 & w<835){
	  var lift=0.91;
	}
	if(w>=835){
	  var lift=0.93;
	}
	if (imageWidth>w){	
	  byFactor = w / imageWidth;			
	  imageWidth = w;
	  imageHeight = imageHeight * byFactor;
	}
	if (imageHeight>h-adj){
	  byFactor = h / imageHeight;
	  imageWidth = (imageWidth * byFactor);
	  imageHeight = h; 
	}
	   
	var scrWidth = w-adj;
	var scrHeight = (h*lift)-adj;

	if (imageHeight>scrHeight){
  	  imageHeight=imageHeight*lift;
	  imageWidth=imageWidth*lift;
	}

	var posLeft=0;
	var posTop=0;

	if (hugger == "hug image"){
	  if (hugMargin == ""){
	    hugMargin = 0;
	  }
	  var scrHeightTemp = imageHeight - 0 + 2*hugMargin;
	  if (scrHeightTemp < scrHeight) {
		scrHeight = scrHeightTemp;
	  } 
	  var scrWidthTemp = imageWidth - 0 + 2*hugMargin;
	  if (scrWidthTemp < scrWidth) {
		scrWidth = scrWidthTemp;
	  }
	  
	  if (scrHeight<100){scrHeight=100;}
	  if (scrWidth<100){scrWidth=100;}

	  posTop =  ((h-(scrHeight/lift)-adj)/2);
	  posLeft = ((w-(scrWidth)-adj)/2);
 	}

	if (imageHeight > (h*lift)-adj || imageWidth > w-adj){
		imageHeight=imageHeight-adj;
		imageWidth=imageWidth-adj;
	}
	posTop = parseInt(posTop);
	posLeft = parseInt(posLeft);		
	scrWidth = parseInt(scrWidth); 
	scrHeight = parseInt(scrHeight);
	
	var agt=navigator.userAgent.toLowerCase();
	if (agt.indexOf("opera") != -1){
	  var args= new Array();
	  args[0]='parent';
	  args[1]=imageName;
	  var i ; document.MM_returnValue = false;
	  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
	} else {
	newWindow = window.open("vwd_justso.htm","newWindow","width="+scrWidth+",height="+scrHeight+",left="+posLeft+",top="+posTop);
	newWindow.document.open();
	newWindow.document.write('<html><title>'+alt+'</title><body leftmargin="0" topmargin="0" marginheight="0" marginwidth="0" bgcolor='+bgcolor+' onBlur="self.close()" onClick="self.close()">');  
	newWindow.document.write('<table width='+imageWidth+' border="0" cellspacing="0" cellpadding="0" align="center" height='+scrHeight+' ><tr><td>');
	newWindow.document.write('<img src="'+imageName+'" width='+imageWidth+' height='+imageHeight+' alt="Click screen to close" >'); 
	newWindow.document.write('</td></tr></table></body></html>');
	newWindow.document.close();
	newWindow.focus();
	}
}
function showAndHide(partid)
			{var id;
			id = "text" + partid;
			if (document.getElementById(id).style.display=="none")
			{
			
			document.getElementById(id).style.display="";
			id = "term" + partid;
			document.getElementById(id).style.color="#5177c3";
			document.getElementById(id).style.letterSpacing="5px";
			}
			else
			{
			
			
			document.getElementById(id).style.display="none";
			id = "term" + partid;
			document.getElementById(id).style.color="#999999";
			}
			}
function show(partid)
			{var id;
			id = "text" + partid;
			document.getElementById(id).style.display="";
			id = "term" + partid;
			document.getElementById(id).style.color="#5177c3";
			document.getElementById(id).style.letterSpacing="5px";
			}
function hide(partid)
			{var id;
			id = "text" + partid;
			document.getElementById(id).style.display="none";
			id = "term" + partid;
			document.getElementById(id).style.color="#999999";
			}
			
function urlActivitiesTheme(value)
	{
		position=window.location.search;
		position=position.indexOf("&")+1;
			
		url="http://varianty.cz/activities.php?theme="+value+"&"+window.location.search.substr(position);
		
		window.location.href=url;
		
		
	}
function urlActivitiesTarget(value)
	{
		position=window.location.search;
		position=position.indexOf("&")+1;
			
		url="http://varianty.cz/activities.php?target="+value+"&"+window.location.search.substr(position);
		
		window.location.href=url;
		
		
	}
function urlPath(idOfPage,idOfTheme)
	{
		position=window.location.search;
		position=position.indexOf("&")+1;
			
		url="index.php?id="+idOfPage+"&theme="+idOfTheme;
		
		window.location.href=url;
		
		
	}
function checkMail(form)
	{
	
		
			re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");
			if (!re.test(form.email.value))
			{
				alert("Neplatný formát e-mail adresy!"); 
				form.email.focus();
				return false;
			}
		
	}
	
