function showPic(id) {

  id.style.opacity = 1.0;
	id.style.filter = 'alpha(opacity=100)';
}


function hidePic(id) {

	kuva1.style.opacity = 0.7;
	kuva1.style.filter = 'alpha(opacity=70)';

}

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

    
    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++;
        }
    }
}

// eri selaimet
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 + ")";
} 


// kuva esiin täysin
function shiftOpacity1(id, millisec) {
  opacity(id, 70, 100, millisec);
}

// feidaa kuva 70:een asti
function shiftOpacity2(id, millisec) {
  opacity(id, 100, 70, millisec);
} 

function shiftOpacitytext1(id, millisec) {
  opacity(id, 0, 100, millisec);
}

function shiftOpacitytext2(id, millisec) {
  opacity(id, 100, 0, millisec);
}