How to find whether browser supports JavaScript or not

1.	How to find whether browser supports JavaScript or not
Answer» The best way to CHECK if a variable exist in JavaScript is to verify it with null. Let us see an example: <HTML> <body> <SCRIPT> var a = 4; if(a != null) { document.write("Variable do exist!"); } </script> </body> </html> The output: Variable do exist! Above, we worked on the condition that a variable exist if it is not null. Therefore we CHECKED the value if variable a like this: if(a != null) { document.write("Variable do exist!"); }

Answer»

The best way to CHECK if a variable exist in JavaScript is to verify it with null.

Let us see an example:

<HTML> <body> <SCRIPT> var a = 4; if(a != null) { document.write("Variable do exist!"); } </script> </body> </html>

The output:

Variable do exist!

Above, we worked on the condition that a variable exist if it is not null. Therefore we CHECKED the value if variable a like this:

if(a != null) { document.write("Variable do exist!"); }

Discussion