$(function(){
	$('.A').click(function(){

/*----FOR H1----*/
		if($('.article h1').length > 0){
			var titleText = $('.article h1');
			var titleFontSize = titleText.css('fontSize');
			var titleFinalNum = parseFloat(titleFontSize, 10);
			var titleStringEnding = titleFontSize.slice(-2);
		
			if(this.id == 'large') {
				titleFinalNum += 2;
			} else if (this.id == 'small'){
				if (titleFinalNum <= 10){
					titleFinalNum = 10;
				}else {
					titleFinalNum -= 2;
				}
			}
			titleText.animate({fontSize: titleFinalNum + titleStringEnding},200);
		}
		
/*----FOR H2----*/
		if($('.article h2').length > 0){
			var header2Text = $('.article h2');
			var header2FontSize = header2Text.css('fontSize');
			var header2FinalNum = parseFloat(header2FontSize, 10);
			var header2StringEnding = header2FontSize.slice(-2);
		
			if(this.id == 'large') {
				header2FinalNum += 2;
			} else if (this.id == 'small'){
				if (titleFinalNum <= 10){
					header2FinalNum = 8;
				}else {
					header2FinalNum -= 2;
				}
			}
			header2Text.animate({fontSize: header2FinalNum + header2StringEnding},200);
		}		
		
/*----FOR H3----*/
		if($('.article h3').length > 0){
			var header3Text = $('.article h3');
			var header3FontSize = header3Text.css('fontSize');
			var header3FinalNum = parseFloat(header3FontSize, 10);
			var header3StringEnding = header3FontSize.slice(-2);
		
			if(this.id == 'large') {
				header3FinalNum += 2;
			} else if (this.id == 'small'){
				if (titleFinalNum <= 10){
					header3FinalNum = 6;
				}else {
					header3FinalNum -= 2;
				}
			}
			header3Text.animate({fontSize: header3FinalNum + header3StringEnding},200);
		}
		
/*----FOR THE PARAGRAPH ITEMS----*/		
		if($('.article p').length > 0){
			var bodyText = $('.article p');
			
			var bodyFontSize = bodyText.css('fontSize');
			var lineHeight = bodyText.css('line-height');
			
			var bodyFinalNum = parseFloat(bodyFontSize, 10);
			var lineHeightNum = parseFloat(lineHeight, 10);
			
			var bodyStringEnding = bodyFontSize.slice(-2);
			var lineHeightEnding = lineHeight.slice(-2);
			
			if(this.id == 'large') {
				bodyFinalNum += 2;
				lineHeightNum += 2;
			}else if (this.id == 'small'){
				if (titleFinalNum <= 10){
					bodyFinalNum = 6;
				}else {
					bodyFinalNum -= 2;
					lineHeightNum -= 2;
				}
			}
			bodyText.animate({fontSize: bodyFinalNum + bodyStringEnding},200);
			bodyText.css('line-height', lineHeightNum + lineHeightEnding);
		}
		

/*----FOR THE UN-ORDERED LIST ITEMS----*/		
		if($('.article li').length > 0){
			var unorderedListText = $('.article li');
			var unorderedListFontSize = unorderedListText.css('fontSize');
			var unorderedListFinalNum = parseFloat(unorderedListFontSize, 10);
			var unorderedListEnding = unorderedListFontSize.slice(-2);
			
			if(this.id == 'large') {
				unorderedListFinalNum +=2;			
			}else if (this.id == 'small'){
				if (titleFinalNum <= 10){
					unorderedListFinalNum = 6;
				}else {
					unorderedListFinalNum -=2;
				}
			}
			unorderedListText.animate({fontSize: unorderedListFinalNum + unorderedListEnding},200);
		}
		
	});
});