源代码:
<html> <body> <script type="text/javascript"> <!-- var book = "maths"; if( book == "history" ){ document.write("<b>History Book</b>"); }else if( book == "maths" ){ document.write("<b>Maths Book</b>"); } else if( book == "economics" ){ document.write("<b>Economics Book</b>"); } else{ document.write("<b>Unknown Book</b>"); } //--> </script> <p>Set the variable to different value and then try...</p> </body> <html>
运行结果：
程序员工具