I have a javascript variable called "myvar" in two different frames (frame1 and frame2). I need to take the myvar in frame1 and set it as the value of the myvar in frame2. How do I do this without an external script?
If the variable is in the parent, use:
window.parent.varName
If it's in another frame, go through the parent, then to the frame:
window.parent.frameName.varName
来源：https://stackoverflow.com/questions/15009722/how-to-save-javascript-variable-between-frames