/////////////////////////////////////////
// MapBox 1
// Diseñado por Joel A. Villarreal
// CordobaSitios (c) 2008
/////////////////////////////////////////

	var isIE = document.all ? true : false;
	var isFF = document.getElementById && !document.all;		
	var divBlur = document.getElementById("blur");
	var mBox = document.getElementById("fadebox");
	var step = 0.05;
	var final = 0.7;
	var tmr;
	
	function openBox() {
		if (isIE)
			divBlur.filters.Alpha.Opacity = 0;
		else
			divBlur.style.opacity = 0;
			
		divBlur.style.display = "block";
		tmr = setInterval("blurOn()", 10);
	}
	
	function blurOn() {
		if (isIE) {
			if (divBlur.filters.Alpha.Opacity < final*100) {
				divBlur.filters.Alpha.Opacity += (step*2*100);
			} else {
				showBox();
				clearInterval(tmr);
			}
		} else {
			divBlur.style.opacity = final;
			showBox();
			clearInterval(tmr);
		}
	}
	
	function blurOff() {
		if (isIE) {
			if (divBlur.filters.Alpha.Opacity > 0) {
				divBlur.filters.Alpha.Opacity -= (step*2*100);
			} else {
				divBlur.style.display = "none";
				clearInterval(tmr);
			}
		} else {
			divBlur.style.display = "none";
			divBlur.style.opacity = 0;
			clearInterval(tmr);
		}
	}

	
	function scroll_top() {
		if (window.pageYOffset) {
			return window.pageYOffset;
		} else {
			return Math.max(document.body.scrollTop,document.documentElement.scrollTop);
		}
	}

	function showBox() {
		mBox.style.display = "block";
		mBox.style.top = scroll_top() + 35 + "px";
	}
	
	function closeBox() {
		mBox.style.display = "none";	
		tmr = setInterval("blurOff()", 10);
	}