[Solved] How to use a variable inside a string

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Use this code

document.getElementById("aaa:j_idt89:"+ i +":asd").innerHTML

Note the change I made inside. "+ i +" . You actually needed a String Concatenation.

So explaining the code.

when i = 1

"aaa:j_idt89:"+ i +":asd" = "aaa:j_idt89:"+ 1 +":asd" = "aaa:j_idt89:1:asd" = thats what you need

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solved How to use a variable inside a string