function convertPreBlocks() {}
  var regular = "x-small";
  function bigger(thing) {
 	  thing.style.fontSize = "large";
 	  siblingElement = thing.previousSibling;
 	  while(siblingElement) {
 		   if(siblingElement.tagName=="SPAN") {
 			    siblingElement.style.fontSize = "medium";
 			    break;
 		   }
 		 siblingElement = siblingElement.previousSibling;
 	}
 	siblingElement = thing.nextSibling;
 	while(siblingElement) {
 		 if(siblingElement.tagName=="SPAN") {
 			  siblingElement.style.fontSize = "medium";
 			  break;
 		 }
 		 siblingElement = siblingElement.nextSibling;
 	}
}

function normal(thing){
 	thing.style.fontSize = regular;
 	siblingElement = thing.previousSibling;
 	while(siblingElement) {
  		if(siblingElement.tagName=="SPAN") {
  			 siblingElement.style.fontSize = regular;
  			 break;
  		}
  		siblingElement = siblingElement.previousSibling;
  }
 	siblingElement = thing.nextSibling;
 	while(siblingElement) {
 		 if(siblingElement.tagName=="SPAN") {
 			  siblingElement.style.fontSize = regular;
 			  break;
 		 }
 		 siblingElement = siblingElement.nextSibling;
 	}
}