var cnt = 2;
var CLASSES = ["XSmall", "Small", "Normal", "Medium", "Large", "XLarge"];


function uTexto(id){
	if( cnt < (CLASSES.length - 1)){
		cnt++;
		var o = $(id);
		o.className = o.className.replace(CLASSES[cnt-1], CLASSES[cnt]);		
	}
}

function dTexto(id){
	if( cnt > 0 ){
		cnt--;
		var o = $(id);
		o.className = o.className.replace(CLASSES[cnt+1], CLASSES[cnt]);		
	}
}