variables - How can I display an alert that shows the value of a var in javascript -

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i have javascript file displays popup alert has value value of var must use:

var errorsite = "web4all";  function displayerror{     alert("there has been error on " && var errorsite && "!") }

i want have alert says:

there has been error on web4all!

just use + concatenate:

alert("there has been error on " + errorsite + "!")

note not use var keyword here, declare new "errorsite" variable (and not use existing 1 declared)!


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