function Open_Window(Str_Url,Window_Name,Window_Width,Window_Height,scroll_mode){
var Window_Dimensions;
var Window_Left=(screen.availwidth/2)-(Window_Width/2);
var Window_Top=(screen.availheight/2)-(Window_Height/2);
if (scroll_mode==1){
  Window_Dimensions="height="+Window_Height+",width="+Window_Width+",left="+Window_Left+",top="+Window_Top+",scrollbars=1";
}
else{
  Window_Dimensions="height="+Window_Height+",width="+Window_Width+",left="+Window_Left+",top="+Window_Top;
}
new_window=window.open(Str_Url,Window_Name,Window_Dimensions);
new_window.focus()
}