function FullSizeImage() { 
var piclink; 

piclink = document.URL.substr( document.URL.lastIndexOf( "/" ) + 1 ); 

// Opera check needs to be first! 

if ( navigator.userAgent.toLowerCase().indexOf( "opera" ) > 0 ) MeinFenster = window.open( "(showFullSizeImage)?OpenAgent&" + piclink + "&" + screen.width + "&" + screen.height, "Originalbild", "resizable=yes,width=\"" + screen.width + ",height=\"" + screen.height + "\",scrollbars");                //opera 
else if(document.all) MeinFenster = window.open( "./../(showFullSizeImage)?OpenAgent&" + piclink + "&" + screen.width + "&" + screen.height, "Originalbild", "resizable=yes,width=\"" + screen.width + ",height=\"" + screen.height + "\",scrollbars");                        //ie 
else if(document.layers) MeinFenster = window.open( "(showFullSizeImage)?OpenAgent&" + piclink + "&" + screen.width + "&" + screen.height, "Originalbild", "resizable=yes,width=\"" + screen.width + ",height=\"" + screen.height + "\",scrollbars");                        //ns4 
else if(document.getElementById) MeinFenster = window.open( "(showFullSizeImage)?OpenAgent&" + piclink + "&" + screen.width + "&" + screen.height, "Originalbild", "resizable=yes,width=\"" + screen.width + ",height=\"" + screen.height + "\",scrollbars");                //mozilla 
else MeinFenster = window.open( "(showFullSizeImage)?OpenAgent&" + piclink + "&" + screen.width + "&" + screen.height, "Originalbild", "resizable=yes,width=\"" + screen.width + ",height=\"" + screen.height + "\",scrollbars"); 

MeinFenster.focus(); 
}