$(function(){ 
        $('img.zoom').click(function(){ 
            var ourText = $('div#main h3, div#main p, div#main ul, div#main ol div#mainleft p, div#mainright p'); 
            var currFontSize = ourText.css('fontSize'); 
            var finalNum = parseFloat(currFontSize, 10); 
            var stringEnding = currFontSize.slice(-2); 
            if(this.id == 'plus') { 
                finalNum *= 1.2; 
            } 
            else if (this.id == 'minus'){ 
                finalNum /=1.2; 
            } 
            ourText.animate({fontSize: finalNum + stringEnding},600); 
        }); 
    });