function doClick(picname, alt, winWidth,winHeight)
{
var maxWinWidth = screen.width -150;
var maxWinHeight = screen.height-100;
var winName = '';
var LeftPosition = (screen.width) ? (screen.width -winWidth )/2 : 0;
var TopPosition = (screen.height) ? (screen.height-winHeight)/2 : 0;
var pWin = window.open("",winName,"width="+winWidth+",height="+winHeight+",left="+LeftPosition+",top="+TopPosition+",menubar=no,toolbar=no,statusbar=no");
pWin.document.write("W.GABUS ["+alt+"]![]("+picname+")
");
}