function getElem(elemID) {
    return (document.getElementById) ? document.getElementById(elemID) :
        ((document.all) ? document.all[elemID] : null);
}

var fontSizes = new Array(10, 14, 18, 22, 16, 20, 13, 12, 19, 21, 17, 16, 14, 18);

function fisherYates ( myArray ) {
  var i = myArray.length;
  if ( i == 0 ) return false;
  while ( --i ) {
     var j = Math.floor( Math.random() * ( i + 1 ) );
     var tempi = myArray[i];
     var tempj = myArray[j];
     myArray[i] = tempj;
     myArray[j] = tempi;
   }
}

function switchFontSizes() {
	fisherYates(fontSizes);
    for (var num = 1; num <= 14; ++num) {
    	var essayElement = getElem("essay" + num);
    	essayElement.style.fontSize = fontSizes[num - 1] + "pt";
    }	
}

window.onload = switchFontSizes