document.write(req1+"与"+req2+"和:"+sumq);没有运行结果吗
<script type="text/javascript">
function app2(x,y)
{ var sum,x,y;
sum = x * y;
return sum;
}
req1=app2(5,6);
req2=app2(2,3);
sump=req1+req2;
document.write("req1的值:"+req1+"<br/>");
document.write("req2的值:"+req2+"<br/>");
document.write(req1+"与"+req2+"和:"+sumq);
</script>
