function openwin(wUrl,wWidth,wHeight){
scWidthCenter=screen.availWidth/2;
scHeightCenter=screen.availHeight/2;
wOption =
"status=yes,scrollbars=yes,directories=no,menubar=no,resizable=yes,toolbar=no,titlebar=no,width="+wWidth+",height="+wHeight+",left="+(scWidthCenter-(wWidth/2))+",top="+(scHeightCenter-(wHeight/2));
myWindow = window.open(wUrl,'window1',wOption);
if (myWindow.focus!=null) {
myWindow.focus();
}
}