[javascript] Append to string variable

How can I append a word to an already populated string variable with spaces?

Ronal, to answer your question in the comment in my answer above:

function wasClicked(str)
{
  return str+' def';
}

var str1 = "add";
str1 = str1 + " ";

Hope that helps,

Dan

var str1 = 'abc';
var str2 = str1+' def'; // str2 is now 'abc def'