diff --git a/web/script_2.js b/web/script_2.js
@@ -55,16 +55,17 @@ if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine
 }
 
 var TOC_SCREEN_WIDTH_CUTOFF = 667
+var TOC_EM = '1.8em'
 
 if (isMobile && window.screen.width < TOC_SCREEN_WIDTH_CUTOFF) {
-    $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", "1.8em");
+    $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", TOC_EM);
 }
 
 function updateToc() {
   if (isMobile && window.screen.width < TOC_SCREEN_WIDTH_CUTOFF) {
-      $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", "1.8em");
+      $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", TOC_EM);
   } else {
-      $(`code:contains(ToC)`).html(TOC).css("line-height", "1.8em");
+      $(`code:contains(ToC)`).html(TOC).css("line-height", TOC_EM);
   }
 }
 window.addEventListener("orientationchange", updateToc, false);

Original file line number	Diff line number	Diff line change
`@@ -55,16 +55,17 @@ if(/(android\|bb\d+\|meego).+mobile\|avantgo\|bada\/\|blackberry\|blazer\|compal\|elaine`
`55`	`55`	`}`
`56`	`56`
`57`	`57`	`var TOC_SCREEN_WIDTH_CUTOFF = 667`
	`58`	`+var TOC_EM = '1.8em'`
`58`	`59`
`59`	`60`	`if (isMobile && window.screen.width < TOC_SCREEN_WIDTH_CUTOFF) {`
`60`		- $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", "1.8em");
	`61`	+ $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", TOC_EM);
`61`	`62`	`}`
`62`	`63`
`63`	`64`	`function updateToc() {`
`64`	`65`	`if (isMobile && window.screen.width < TOC_SCREEN_WIDTH_CUTOFF) {`
`65`		- $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", "1.8em");
	`66`	+ $(`code:contains(ToC)`).html(TOC_MOBILE).css("line-height", TOC_EM);
`66`	`67`	`} else {`
`67`		- $(`code:contains(ToC)`).html(TOC).css("line-height", "1.8em");
	`68`	+ $(`code:contains(ToC)`).html(TOC).css("line-height", TOC_EM);
`68`	`69`	`}`
`69`	`70`	`}`
`70`	`71`	`window.addEventListener("orientationchange", updateToc, false);`