$(document).ready(function(){
	// apply to all png images
	$('img[@src$=.png]').ifixpng();
});

var letra = 12;
var inter_letra = 2;
var letra_max = 20;
var letra_min = 12;

function augLet(opt){
	if (opt){
		if (document.getElementById('letra'+opt)) {
			if (letra_max!=document.getElementById('letra'+opt).innerHTML){
				document.getElementById('letra'+opt).innerHTML = parseInt(document.getElementById('letra'+opt).innerHTML) + inter_letra;
				document.getElementById('txt_cuerpo'+opt).style.fontSize = (parseInt(document.getElementById('letra'+opt).innerHTML))+"px";
				document.getElementById('txt_cuerpo'+opt).style.lineHeight = ((parseInt(document.getElementById('letra'+opt).innerHTML))+(inter_letra*3))+"px";
			}
		}
	} else {
		if (letra_max!=letra) {
			letra = letra + inter_letra;
			document.getElementById('txt_cuerpo').style.fontSize = letra+"px";
			document.getElementById('txt_cuerpo').style.lineHeight = letra+(inter_letra*4)+"px";
		}
	}
}

function disLet(opt) {
	if (opt) {
		if (document.getElementById('letra'+opt)) {
			if (letra_min!=document.getElementById('letra'+opt).innerHTML) {
				document.getElementById('letra'+opt).innerHTML = parseInt(document.getElementById('letra'+opt).innerHTML) - inter_letra;
				document.getElementById('txt_cuerpo'+opt).style.fontSize = (parseInt(document.getElementById('letra'+opt).innerHTML))+"px";
				document.getElementById('txt_cuerpo'+opt).style.lineHeight = ((parseInt(document.getElementById('letra'+opt).innerHTML))+(inter_letra*3))+"px";
			}
		}
	} else {
		if (letra_min!=letra) {
			letra = letra - inter_letra;
			document.getElementById('txt_cuerpo').style.fontSize = letra+"px";
			document.getElementById('txt_cuerpo').style.lineHeight = letra+(inter_letra*4)+"px";
		}
	}
}


//http://www.leigeber.com/2008/11/drop-down-menu/
var menu=function(){
	var t=15,z=50,s=6,a;
	function dd(n){this.n=n; this.h=[]; this.c=[]}
	dd.prototype.init=function(p,c){
		a=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
		for(i;i<l;i++){
			var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
			h.onmouseover=new Function(this.n+'.st('+i+',true)');
			h.onmouseout=new Function(this.n+'.st('+i+')');
		}
	}
	dd.prototype.st=function(x,f){
		var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
		clearInterval(c.t); c.style.overflow='hidden';
		if(f){
			p.className+=' '+a;
			if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
			if(c.mh==c.offsetHeight){c.style.overflow='visible'}
			else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
		}else{p.className=p.className.replace(a,''); c.t=setInterval(function(){sl(c,-1)},t)}
	}
	function sl(c,f){
		var h=c.offsetHeight;
		if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
			if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
			clearInterval(c.t); return
		}
		var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
		c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
		c.style.height=h+(d*f)+'px'
	}
	return{dd:dd}
}();