<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>返回值函数</title><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); function z(x,y){ z=x+y; return z;} sump=z(req1,req2);document.write("req1的值:"+req1+"<br/>");document.write("req2的值:"+req2+"<br/>");document.write(req1+"与"+req2+"和:"+sumq);</script></head><body></body></html><!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>返回值函数</title><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></head><body></body></html>两种都是显示相同的代码，如下req1的值:30req2的值:6
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