==javaScript 计算器
function getResult(type){
if(checkData(type)==false){
return ;
}
var num1=parseFloat(document.jisuanqi.num1.value);
var num2=parseFloat(document.jisuanqi.num2.value);
var result;
switch(type){
case '+':
result=num1+num2;
break;
case '-':
result=num1-num2;
break;
case '*':
result=num1*num2;
break;
case '/':
result=num1/num2;
break;
case '%':
result=num1%num2;
break;
}
