function BMF_sum(){var aa,Moperator;var resVal=new Number('0');for(var i=0;i<arguments.length-1;i++){aa=new String(arguments[i]);if(aa.charAt(0)=='-'){aa=aa.substr(1,aa.length-1);Moperator='-';}else{Moperator='+';}if(GEBI(aa)!=null){if(Moperator=='-'){resVal-=Number(GEBI(aa).value);}else{resVal+=Number(GEBI(aa).value);}}}GEBI(arguments[i]).value=resVal;}