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Revision: 10954
at January 19, 2009 08:39 by tonic
Initial Code 
var foo = "bar";

if ( typeof( window[ 'foo' ] ) != "undefined" ) {
   document.write("foo is defined")
} else {
   document.write("foo is undefined")
}
Initial URL 
http://www.rgagnon.com/jsdetails/js-0112.html
Initial Description 









Initial Title





Test if variable exists









Initial Tags














Initial Language





JavaScript