It looks like IE, Netscape & Safari.
http://www.java.com/js/deployJava.txt
getJREs: function() {
var list = new Array();
if (deployJava.isPluginInstalled()) {
var plugin = deployJava.getPlugin();
var VMs = plugin.jvms;
for (var i = 0; i < VMs.getLength(); i++) {
list[i] = VMs.get(i).version;
}
} else {
var browser = deployJava.getBrowser();
if (browser == 'MSIE') {
if (deployJava.testUsingActiveX('1.7.0')) {
list[0] = '1.7.0';
} else if (deployJava.testUsingActiveX('1.6.0')) {
list[0] = '1.6.0';
} else if (deployJava.testUsingActiveX('1.5.0')) {
list[0] = '1.5.0';
} else if (deployJava.testUsingActiveX('1.4.2')) {
list[0] = '1.4.2';
} else if (deployJava.testForMSVM()) {
list[0] = '1.1';
}
} else if (browser == 'Netscape Family') {
deployJava.getJPIVersionUsingMimeType();
if (deployJava.firefoxJavaVersion != null) {
list[0] = deployJava.firefoxJavaVersion;
} else if (deployJava.testUsingMimeTypes('1.7')) {
list[0] = '1.7.0';
} else if (deployJava.testUsingMimeTypes('1.6')) {
list[0] = '1.6.0';
} else if (deployJava.testUsingMimeTypes('1.5')) {
list[0] = '1.5.0';
} else if (deployJava.testUsingMimeTypes('1.4.2')) {
list[0] = '1.4.2';
} else if (deployJava.browserName2 == 'Safari') {
if (deployJava.testUsingPluginsArray('1.7.0')) {
list[0] = '1.7.0';
} else if (deployJava.testUsingPluginsArray('1.6')) {
list[0] = '1.6.0';
} else if (deployJava.testUsingPluginsArray('1.5')) {
list[0] = '1.5.0';
} else if (deployJava.testUsingPluginsArray('1.4.2')) {
list[0] = '1.4.2';
}
}
}
}