function popup(picture, imageWidth, imageHeight, alt, bgcolor, hugger, hugMargin) {
  var win_ie_ver = parseFloat(navigator.appVersion.split("MSIE")[1]);
  if (navigator.userAgent.indexOf('Mac')        >= 0) { win_ie_ver = false; }
  if (navigator.userAgent.indexOf('Windows CE') >= 0) { win_ie_ver = false; }
  if (navigator.userAgent.indexOf('Opera')      >= 0) { win_ie_ver = false; }
  if (win_ie_ver >= 4.0) 							  { win_ie_ver = true; }
  if (win_ie_ver == true) {
    imageWidth   = parseInt(imageWidth);
    imageHeight  = parseInt(imageHeight);
    imageWidth   += 6;
    imageHeight  += 25;
    window.showModelessDialog('popup_ie.htm',picture,'scroll:0; status:0; help:0; dialogWidth:' + imageWidth + 'px; dialogHeight:' + imageHeight + 'px;'); 
  } else {
	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();

	newWindow = window.open("popup_other.htm","newWindow","width="+scrWidth+",height="+scrHeight+",left="+posLeft+",top="+posTop);
	newWindow.document.open();
	newWindow.document.write('<html><title>Zoom</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='+imageHeight+' ><tr><td>');
	newWindow.document.write('<img src="'+picture+'" width='+imageWidth+' height='+imageHeight+' alt="Klicken Sie auf das Bild um es zu schliessen" >'); 
	newWindow.document.write('</td></tr></table></body></html>');
	newWindow.document.close();
	newWindow.focus();
  }
}
