这段js怎么还是未定义呢?
//自定义函数 function jiSuan(num1,num2,operator){ var res=0; if (operator=="+"){ res=num1+num2; }else if (operator=="-"){ res=num1-num2; }else if (operator=="*"){ res=num1*num2; }else { res=num1/num2; } return res; }//自定义函数 firebug还在报jiSuan未定义,已经引入了js,咋回事呢?