Invalid javascript: void (0) parameter

<Div class = "helpicon" div align = "right" style = "gray"> <a href = "javascript: void (0)" onClick = "window. open ('. /docs/help.html ', 'Here it is', 'width = 640, height = 480, resizable = yes, directories = no, location = no, status = no, toolbar = no, scrollbars = yes,
Titlebar = no, menubar = no'); "> </a> </div>

 

Window. open under IE reports invalid parameter error! (Javascript: void (0) is invalid .)

The red part cannot be written in disorder. Currently, only "space" and "-" IE are found to report an error.
All of them are error. Do you have any other symbols that you do not know? At present, it is found that the confirmation is correct.

However, safari. Mozilla and FF can all be used. I am speechless. But it is best not to write it there. It is not necessary to talk about it.

Be careful!