function pop(iUrl, winW, winH, winN) {
var iWidth = (winW)? winW : 620;// ширина окна 
var iHeight = (winH)? winH : 480;//высота окна 
var iTitle = (winN)? winN : 'popupWin';
var scrollB = 'no';
var posCode = '';

if(screen) {
var scrW = screen.width ? screen.width - 100 : 0;
var scrH = screen.height ? screen.height - 100 : 0;
if( scrW < iWidth ) { scrollB = 'yes'; iWidth = scrW; }
else { scrW = screen.width }
if( scrH < iHeight ) { scrollB = 'yes'; iHeight = scrH; }
else { scrH = screen.height }
var posX = Math.round( ( scrW - iWidth ) / 2 );
var posY = Math.round( ( scrH - iHeight ) / 2 );
posCode = ',left='+posX+',top='+posY;
}

iOptions = 'width=' + iWidth + ',height=' + iHeight + ',scrollbars=' + scrollB + ',resizable=yes,toolbar=no,status=yes' + posCode;

if(iUrl.match(/\.(gif|jpe?g|png)$/i)) {
popWin = window.open('', '_blank', iOptions);
popWin.document.open();
popWin.document.write('<html><head><title>' +
iTitle +
'<\/title><\/head><body style="background: #fff; margin: 0; padding: 0;">' +
'<table cellpadding="0" cellspacing="0" border="0" height="100%"><tr><td>' +
'<img src="' + iUrl + '" /><\/td><\/tr><\/table><\/body><\/html>'
);
popWin.document.close();
} else {
popWin = window.open(iUrl, iTitle, iOptions);
}

popWin.focus();
return false;
}
