摘要:
<script language="javascript"> var x=2 y=4 document.write("加法:"+(x+y)+"<br>"); document.write("减法:"+(y-x)+"<br>"); document.write("乘法:"+(x*y)+"<br>"); document.write("除法:"+(y/x)+"<br>&q 阅读全文
摘要:
<script language="javascript"> document.write("Hello World!");</script> 阅读全文