function getElementsByClassName(nome){

	var elements;
	var curElements;
	var cont;
	var i;
	var c;
	
	cont = 0
	
	elements = "div,p,span";
	
	elements = elements.split(",");
	
	for (i=0; i<elements.length; i++){
		   curElements = document.getElementsByTagName(elements[i]);
		   for (c=0; c<curElements.length; c++){
			   if (document.getElementsByTagName(elements[i])[c].className==nome){
				  cont = cont + 1;
			   }
		   }
	}
	return cont;
}

function tamanhoFonte(atual){
	
	tam11 = new Array();
	tam12 = new Array();
	tam13 = new Array();
	tam14 = new Array();
	tam15 = new Array();
	tam16 = new Array();
	tam17 = new Array();
	tam18 = new Array();
	tam19 = new Array();
	tam20 = new Array();
	tam21 = new Array();
	tam22 = new Array();

	if(atual=="aumenta"){
		//alert(getElementsByClassName(tam11));
		if (getElementsByClassName('tam11') != 0){
			tam11 = $$(".tam11").getStyle("font-size");
			tamanhoAtual = (tam11[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 14){
				$$(".tam11").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam12') != 0){
			tam12 = $$(".tam12").getStyle("font-size");
			tamanhoAtual = (tam12[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 15){
				$$(".tam12").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam13') != 0){
			tam13 = $$(".tam13").getStyle("font-size");
			tamanhoAtual = (tam13[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 16){
				$$(".tam13").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam14') != 0){
			tam14 = $$(".tam14").getStyle("font-size");
			tamanhoAtual = (tam14[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 17){
				$$(".tam14").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam15') != 0){
			tam15 = $$(".tam15").getStyle("font-size");
			tamanhoAtual = (tam15[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 18){
				$$(".tam15").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam16') != 0){
			tam16 = $$(".tam16").getStyle("font-size");
			tamanhoAtual = (tam16[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 19){
				$$(".tam16").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam17') != 0){
			tam17 = $$(".tam17").getStyle("font-size");
			tamanhoAtual = (tam17[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 20){
				$$(".tam17").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam18') != 0){
			tam18 = $$(".tam18").getStyle("font-size");
			tamanhoAtual = (tam18[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 21){
				$$(".tam18").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam19') != 0){
			tam19 = $$(".tam19").getStyle("font-size");
			tamanhoAtual = (tam19[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 22){
				$$(".tam19").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam20') != 0){
			tam20 = $$(".tam20").getStyle("font-size");
			tamanhoAtual = (tam20[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 23){
				$$(".tam20").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam21') != 0){
			tam21 = $$(".tam21").getStyle("font-size");
			tamanhoAtual = (tam21[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 24){
				$$(".tam21").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam22') != 0){
			tam22 = $$(".tam22").getStyle("font-size");
			tamanhoAtual = (tam22[0]).toInt();
			tamFinal = tamanhoAtual + 1;
			if(tamFinal < 25){
				$$(".tam22").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
	
	}else if(atual=="diminui"){
		if (getElementsByClassName('tam11') != 0){
			tam11 = $$(".tam11").getStyle("font-size");
			tamanhoAtual = (tam11[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 11){
				$$(".tam11").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam12') != 0){
			tam12 = $$(".tam12").getStyle("font-size");
			tamanhoAtual = (tam12[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 12){
				$$(".tam12").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam13') != 0){
			tam13 = $$(".tam13").getStyle("font-size");
			tamanhoAtual = (tam13[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 13){
				$$(".tam13").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam14') != 0){
			tam14 = $$(".tam14").getStyle("font-size");
			tamanhoAtual = (tam14[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 14){
				$$(".tam14").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam15') != 0){
			tam15 = $$(".tam15").getStyle("font-size");
			tamanhoAtual = (tam15[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 15){
				$$(".tam15").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam16') != 0){
			tam16 = $$(".tam16").getStyle("font-size");
			tamanhoAtual = (tam16[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 16){
				$$(".tam16").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam17') != 0){
			tam17 = $$(".tam17").getStyle("font-size");
			tamanhoAtual = (tam17[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 17){
				$$(".tam17").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam18') != 0){
			tam18 = $$(".tam18").getStyle("font-size");
			tamanhoAtual = (tam18[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 18){
				$$(".tam18").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam19') != 0){
			tam19 = $$(".tam19").getStyle("font-size");
			tamanhoAtual = (tam19[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 19){
				$$(".tam19").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam20') != 0){
			tam20 = $$(".tam20").getStyle("font-size");
			tamanhoAtual = (tam20[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 20){
				$$(".tam20").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam21') != 0){
			tam21 = $$(".tam21").getStyle("font-size");
			tamanhoAtual = (tam21[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 21){
				$$(".tam21").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
		if (getElementsByClassName('tam22') != 0){
			tam22 = $$(".tam22").getStyle("font-size");
			tamanhoAtual = (tam22[0]).toInt();
			tamFinal = tamanhoAtual - 1;
			if(tamFinal >= 22){
				$$(".tam22").setStyle("font-size",tamFinal)
			}
		}
		///////////////////////////
	}
	
}

window.addEvent("domready", function(){
	
	//paginaAtual = $("nomePagina").innerHTML;
	
	$("aumenta").addEvent("click",function(){
		tamanhoFonte("aumenta");
	});
	
	$("diminui").addEvent("click",function(){
		tamanhoFonte("diminui");
	});
	
});