diff --git a/phpBB/adm/style/admin.js b/phpBB/adm/style/admin.js
index 74269e92e9..4f7f5a990b 100644
--- a/phpBB/adm/style/admin.js
+++ b/phpBB/adm/style/admin.js
@@ -7,12 +7,12 @@
 /**
 * Parse document block
 */
-function parse_document(container) 
+function parse_document(container)
 {
 	var test = document.createElement('div'),
 		oldBrowser = (typeof test.style.borderRadius == 'undefined');
 
-	delete test;
+	test.remove();
 
 	/**
 	* Navigation
@@ -92,7 +92,7 @@ function parse_document(container)
 				}
 			});
 		}
-		
+
 		headersLength = headers.length;
 
 		// Add header text to each cell as <dfn>
@@ -159,7 +159,7 @@ function parse_document(container)
 		if ($this.html() == '&nbsp;') {
 			$this.addClass('responsive-hide');
 		}
-		
+
 	});
 
 	/**