function js_window(url,name_, width_, height_){
			if (!width_>0){width_=600;}
			if (!height_>0){height_=500;}
			wnd=window.open( url,name_, 'height='+height_+',width='+width_+',resizable=yes,scrollbars=yes');
			if (window.focus) {wnd.focus()}
			return false;
}