function OpenWin(url,w,h,sc){
	newWin = window.open(url,"new"," toolbar=no, status=yes, width="+w
			+",height="+h+",left="+getLeft(w)+",top="+getTop(h)+",resizable=yes,statusbar=yes,scrollbars="+sc);
	newWin.focus(); 
        }  
function getLeft(winWidth){
		return screen.width/2-winWidth/2;
}
function getTop(winHeight){
		return screen.height/2-winHeight/2;
}