var newwin;

     function launchwin(winurl,winname,winfeatures)
     {
             newwin = window.open(winurl,winname,winfeatures);
     }
	 
	 function weight() {
				launchwin('weight_convert.cfm','weightwindow','width=310,height=400,toolbar=no, scrollbars=no,top=50,left=50')
				}