17. Assignment Operators x=x%y x%=y %= x=x/y x/=y /= x=x*y x*=y *= x=x-y x-=y -= x=x+y x+=y += x=y x=y = Is The Same As Example Operator
18. Comparison Operators is less than or equal to <= is greater than or equal to >= is less than < is greater than > is not equal != is equal to (checks for both value and type) === is equal to == Description Operator
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22. Java Script Object Contains information about the current URL Location Contains the visited URLs in the browser window History Contains information about the client's display screen Screen Contains information about the client's browser Navigator The top level object in the JavaScript hierarchy. The Window object represents a browser window. A Window object is created automatically with every instance of a <body> or <frameset> tag Window Description Object
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25. HTML DOM The DOM (Document Object Model) presents an HTML document as a tree - structure ( a node tree ) , with elements, attributes, and text .