function openWin(url,winname,w,h,scroll) {
	if (scroll != "yes") {
		scroll = "auto";
	}
	topWin = (screen.availHeight - h) / 2;
    leftWin = (screen.availWidth - w) / 2;
	/*
    	if (navigator.platform.indexOf('mac') != -1){
        props = "menubar=yes,width="+w+",height="+h+",top="+topWin+",screenY="+topWin+",left="+leftWin+",screenX="+leftWin+",resizable=yes,scrollbars=yes"; }
*/
        //else {
                props = "width="+w+",height="+h+",top="+topWin+",screenY="+topWin+",left="+leftWin+",screenX="+leftWin+",resizable=yes,scrollbars="+scroll; //}
    var myWin = window.open(url,winname,props);
    myWin.focus();
}