function imgShow(iwidth,iheight,isrc,iheader,icat){
var host='http://'+document.domain;
isrc=host+isrc;
var width=857; var height=550; var left=0; var top=0;
var itwidth=iwidth+15; var itheight=iheight+15;
var options="toolbar=0,location=0,directories=0,status=0,scrollbars=0,resizable=1,menubar=0,width="+width+",";
if (self.screen) {
	var scwidth = screen.width;
	var scheight= screen.height-30
	}
	else if (self.java){
	var jkit = java.awt.Toolkit.getDefaultToolkit();
	var scrsize = jkit.getScreenSize();       
    var scwidth = scrsize.width;
	var scheight= scrsize.height-30
	}
if (height > scheight){
	height=scheight
	}

left=Math.round((scwidth-width)/2)-15; top=Math.round((scheight-height)/2)-18;
options=options+"height="+height+",left="+left+",top="+top;
iShow=window.open('','show_img',options)
iShow.document.title=iheader;
var oBody = iShow.document.body;
oBody.background=host+'/i/book/polotno.jpg';
var iHtml='<table width="100%" height="100%" cellspacing="0" cellpadding="0" border="0"><tr><td align="center">';
iHtml+='<h1 style="font-family:Book Antiqua;Times New Roman">'+iheader+' <sup>'+icat+'</sup></h1>'
iHtml+='<table width='+itwidth+' height='+itheight+' cellspacing=1 cellpadding=7 border=0 bgcolor=#333333>';
iHtml+='<tr><td background="'+host+'/i/book/polotno.jpg">';
iHtml+='<img width='+iwidth+' height='+iheight+' src='+isrc+' alt="" border=0></td></tr></table>';
iHtml+='</td></tr></table>';
oBody.innerHTML=iHtml;
}