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 blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}

////////// 익스플로러 전용 Blend Trans.. Bug 좀 있음 --;;; //////////
function BrowserCheck() {
	var b = navigator.appName
	if (b=="Netscape") this.b = "ns"
	else if (b=="Microsoft Internet Explorer") this.b = "ie"
	else this.b = b
	this.version = navigator.appVersion
	this.v = parseInt(this.version)
	this.ns = (this.b=="ns" && this.v>=4)
	this.ns4 = (this.b=="ns" && this.v==4)
	this.ns5 = (this.b=="ns" && this.v==5)
	this.ie = (this.b=="ie" && this.v>=4)
	this.ie4 = (this.version.indexOf('MSIE 4')>0)
	this.ie5 = (this.version.indexOf('MSIE 5')>0)
	this.min = (this.ns||this.ie)
}

is = new BrowserCheck()


function changemod(ImgName,ImgSrc)
{
	if (is.ie)
	{
		eval(ImgName + '.filters.blendTrans.stop();');
		eval(ImgName + '.filters.blendTrans.Apply();');
		eval(ImgName + '.src=' + ImgSrc + '.src;');
		eval(ImgName + '.filters.blendTrans.Play();');
	}
	else
	{
		eval('document.images.'+ImgName+'.src = '+ImgSrc+'.src;');			
	}
}

function chng(ImgName,ImgSrc) // blendtrans change image
{

	if (is.ie)
	{
		eval(ImgName + '.filters.blendTrans.stop();');
		eval(ImgName + '.filters.blendTrans.Apply();');
		eval(ImgName + '.src=' + ImgSrc + '.src;');
		eval(ImgName + '.filters.blendTrans.Play();');
	}
	else
	{
		eval('document.images.'+ImgName+'.src = '+ImgSrc+'.src;');			
	}
}

function chng2(ImgName,ImgSrc) //reveal Trans change image
{
	if (is.ie)//익스플로러에서는 브랜트렌스 적용
	{
		eval(ImgName + '.filters.blendTrans.stop();');
		eval(ImgName + '.filters.blendTrans.Apply();');
		eval(ImgName + '.filters.RevealTrans.stop();');
		eval(ImgName + '.filters.RevealTrans.Apply();');
		eval(ImgName + '.src=' + ImgSrc + '.src;');
		eval(ImgName + '.filters.blendTrans.Play();');
		eval(ImgName + '.filters.RevealTrans.Play();');	
	}
	else//그외 버젼에는 그냥 이미지 변경
	{
		eval('document.images.'+ImgName+'.src = '+ImgSrc+'.src;');			
		//alert(ImgName);
	}
}

function chng3(ImgName,ImgSrc) //reveal Trans change image
{
		eval('document.images.'+ImgName+'.src = '+ImgSrc+'.src;');			
}