function showbox(elem){
  var crossobj1=document.getElementById(elem)
  crossobj1.style.visibility="visible"
}

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
   
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function fadeImage() {
    var t = window.setTimeout("opacity('slogan', 100, 0, 3000)",2000);
    window-setTimeout("hideLayer()",6000);    
}

function hideLayer(){
	var sloganDiv = document.getElementById('slogan');
	sloganDiv.style.display='none'; 
}


function setCookie(c_name, value, expire_minutes) {
	var expire_time = new Date();
	expire_time.setMinutes(expire_time.getMinutes() + expire_minutes);
	document.cookie = c_name + '=' + escape(value) + ((expire_minutes == null) ? '' : ';expires=' + expire_time.toGMTString());
}

function getCookie(c_name) {
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + '=');
		if (c_start != -1) { 
			c_start = c_start + c_name.length+1; 
			c_end = document.cookie.indexOf(';', c_start);
			if (c_end == -1) c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start, c_end));
		}
	}
	return '';
}

function imageShown() {
	imageshown = getCookie('imageshown');
	if (imageshown != null && imageshown == 'true') {
		return true;
	} else {
		setCookie('imageshown', 'true', 60);
		return false;
	}
}