connection symbols in wordpress

I want to add some javascript in wordpress, something like

开发者_开发技巧if(iNum==0&&iNum+1!=l) 

It shows up wrong, in the source code I found & became & how do I solve it? Thanks.

if(iNum==0&\& iNum+1!=l)

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Where did you put that code?

To insert arbitrary javascript code, you need to use HTML mode in post / page edit window.
To do that, just click on 'HTML' just above editor window (to the right of Upload/Insert tools)