function showPic(imgName,imgw,imgh) {
var s=String(document.location);
var p=s.lastIndexOf('/');
var path=s.substr(0,p+1);
imgName=path+imgName;
w = window.open('','Demo','toolbar=no,location=no,directories=no,status=no,scrollbars=auto,resizable=yes,copyhistory=no,width='+imgw+',height='+imgh+',left='+(screen.width-imgw)/2+',top='+(screen.height-imgh-100)/2);
w.document.write( "Image" );
w.document.write( "