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Remove elements from array by changing the array length

< html> <head> <title>Removing Elements</title> <script language="javascript" type="text/javascript"> <!-- var x = new Array(0,1,2,3,4); var firstElement  = x[x.length-1]; x.length = x.length-1; var secondElement = x[x.length-1]; x.length = x.length-1; alert(firstElement) alert(secondElement) alert(x); //--> </script> </head> <body> <h1>Removing Elements</h1> </body> </html>