function trigHint( id ) {
  if( document.getElementById ) {
		var obj = document.getElementById( id );
    if( obj ) {
			obj.style.display = ( obj.style.display != 'block' ) ? 'block' : 'none';
		}
	}	
}

function trigGalleries() {
	if( document.getElementById ) {
		var cg = document.getElementById( "col_gal" );
		var eg = document.getElementById( "exp_gal" );
		var gal = document.getElementById( "galleries" );
		if( eg.style.display == 'none' || !eg.style.display  ) {
			eg.style.display = 'block';
			cg.style.display = 'none';
			gal.style.display = 'none';
		} else {
			eg.style.display = 'none';
			cg.style.display = 'block';
			gal.style.display = 'block';
		}
	}
	return false;
}

function findObj(n, d) {
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function si() {
  var i,j=0,x,a=si.arguments; document.sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=findObj(a[i]))!=null){document.sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function sir() {
  var i,x,a=document.sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function pi() {
 var d=document; if(d.images){ if(!d.p) d.p=new Array();
   var i,j=d.p.length,a=pi.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function send2friend( url ) {
	var to = prompt( "Your friend's e-mail address:" );
	location.href = "mailto:"+to+"?subject=check%20this%20out&body=Link:%20http://magicgroup.cz/"+url;
}