var newwindow;
 function disp(url,winheight){
 if (newwindow && !newwindow.closed) {
		newwindow.close();
		}

newwindow = window.open(url, 'win01', 'scrollbars=yes,menubar=yes,resizable=yes,left=5,top=5,width=640,height=750'); 

newwindow.focus();
 }
 function windowclo(){
        if (newwindow && !newwindow.closed) {
		newwindow.close();
		}
}