Javascript Boolean Analysis _ Basics

Originally I thought JS boolean conversion and Java, after all, we are the same ancestors, the following is my writing.
function foo () {
var temp = boolean.valueof (' <%=javaBoolean%> ');
Alert (temp = = false);
}
Java variable Javaboolean is a string, its value is "false", I thought it would definitely output true, but the result is false, it is extremely depressing.
Just looked up the "JavaScript Authority Guide", only to be enlightened. The original is this:
If you want to convert a different type to a Boolean, you should use Boolean (value) or new Boolean (value), which is boolean.valueof (), is not a Boolean static method, and one thing is important: 0, NaN, Null, empty strings, and undefined are converted to false, and other original values, except false (but containing the string "false"), and other objects and arrays are converted to true.
See here, you should feel that JS fooled a piece is also worth it?