var change=true;

function Browser(){
  if (navigator.appName.indexOf("Netscape") > -1) {return "Netscape";}
  if (navigator.appName.indexOf("Explorer") > -1) {return "Explorer";}
  return "Unknown";}

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 shiftOpacity(id, millisec) {
    //if an element is invisible, make it visible, else make it ivisible
    if(document.getElementById(id).style.opacity == 0) {
        opacity(id, 0, 100, millisec);
    } else {
        opacity(id, 100, 0, millisec);
    }
}
function init(numElements){
	
	for(i=1;i<=numElements;i++){
		changeOpac(0,'p'+i);	
	}
}
function hide(divid){
	
	document.getElementById(divid).style.display="none";
}

function showHide(divid,numElements,eid){
	var v = document.getElementById(divid).style.display;
	change=!change;
	if (Browser()=="Netscape"){
		if(v=='none'){
			document.getElementById(divid).style.display="inline";
			for(k=1;k<=numElements;k++){
				
				opacity(eid+k,0,100,2000);
			}
		}
		if(v=='inline'){
			for(j=1;j<=numElements;j++){
				opacity(eid+j,100,0,1000);
			}
			
			setTimeout("hide('"+divid+"')",900);
		}
	}
	if (Browser()=="Explorer"){
		if(v=='none'){
			document.getElementById(divid).style.display="inline";
			for(k=1;k<=numElements;k++){
				changeOpac(100,eid+k);
			}
		}
		if(v=='inline'){
			document.getElementById(divid).style.display="none";	
		}
	}
}