var m=0;

// Fading Rate
var fadingRate = 800;
var swapTime = 6850; //6.85 seconds after appearing, it fades


function swapnFade(flag) {
	if(flag=="0") {
	document.getElementById('topart1').style.display='';
	} else {
	document.getElementById('topart').style.display='';
	}

	fadeImg(flag);
	
	if(flag=="0") {
		setTimeout("setBlank('topart')",fadingRate);
	} else {
		setTimeout("setBlank('topart1')",fadingRate);
	}
	setTimeout("swapImg()",swapTime);
}

function getInnerHTMLPreload(arrayImg,iMax) {
		var slideHTML = "";
		var z = 0;
		for (z=0;z<iMax;z++) {
			slideHTML += '<img src="'+arrayImg[z][0]+'">';
		}
		return slideHTML;
}

function getInnerHTML(nImg,nUrl) {
		var slideHTML = "";
		if(nUrl!="") {
			slideHTML ='<a href="'+nUrl+'"><img src="'+nImg+'"></a>';
		} else {
			slideHTML = '<img src="'+nImg+'">';
		}

		return slideHTML;
}

function fadeImg(flag) {
	if(flag=="0") {
		opacity('topart',100,0,fadingRate);
		opacity('topart1',0,100,fadingRate);
	} else {
		opacity('topart',0,100,fadingRate);
		opacity('topart1',100,0,fadingRate);
	}
}

function setBlank(id) {
	document.getElementById(id).style.display='none';
}

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 + ")";
}