jsp检测是否安装jre
关于Applet在客户端运行时，如果没有jre会下载安装jre的问题，以下的这段代码能够实现如果没有jre1.5.0_09
则会下载安装：<object classid = "clsid:CAFEEFAC-0015-0000-0009-ABCDEFFEDCBA"codebase = "http://java.sun.com/update/1.5.0/jinstall-1_5_0_09-windows-i586.cab#Version=5,0,90,3"WIDTH = "500" HEIGHT = "400" ><PARAM NAME = CODE VALUE = "HelloWorld" ><param name = "type" value = "application/x-java-applet;jpi-version=1.5.0_09"><param name = "scriptable" value = "false"><comment><embed type = "application/x-java-applet;jpi-version=1.5.0_09"CODE = "HelloWorld"WIDTH = "500" HEIGHT = "400"scriptable = falsepluginspage ="http://java.sun.com/products/plugin/index.html#download"><noembed> </noembed></embed></comment></object>
