var detect = navigator.userAgent;
var msie = checkIt('MSIE');
function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

function imgAnim (n,img,m,t) {
// n = start image number
// img = name of image object
// m = number of the last image in the animation sequence
// t = delay in seconds

	dur = 3;
	pic = "/navbar/"+img+n+".gif";
//alert (pic)
	src = "url("+pic+")";
//alert (imgid+","+src)
	var layera = img+"a";
	var layerb = img+"b";
	oImg = document.getElementById(layera)
	oImg1 = document.getElementById(layerb)
//	alert (imgid);
	if (msie) {
		d = t - 1; if (d < 0) {d = 1;}
		oImg.style.filter = "progid:DXImageTransform.Microsoft.GradientWipe(Duration="+dur+",WipeStyle=1)";
	    oImg.filters[0].apply();
		oImg.style.backgroundImage = src;
		oImg.filters[0].play()
	} else {
		oImg1.style.backgroundImage = oImg.style.backgroundImage;
		changeOpac(0, layera)
		oImg.style.backgroundImage = src;
		opacity (layera,0,100,(dur*1000));
	}

	if (n < m) {n++} else {n=0}
	delay = t * 1000;
	setTimeout("imgAnim("+n+",'"+img+"',"+m+","+t+");", delay);
}

function portfolioAnim (n,img,imgid,m,t) {
// n = start image number
// img = name of image object
// m = number of the last image in the animation sequence
// t = delay in seconds
	dur = 3;
	pic = "/navbar/"+img+n+".gif";
	src = "url("+pic+")";
//alert (imgid+","+src)
	var layera = imgid+"a";
	var layerb = imgid+"b";
	oImg = document.getElementById(layera)
	oImg1 = document.getElementById(layerb)
//	alert (imgid);
	if (msie) {
		d = t - 1; if (d < 0) {d = 1;}
		oImg.style.filter = "progid:DXImageTransform.Microsoft.GradientWipe(Duration="+dur+",WipeStyle=1)";
	    oImg.filters[0].apply();
		oImg.style.backgroundImage = src;
		oImg.filters[0].play()
	} else {
		oImg1.style.backgroundImage = oImg.style.backgroundImage;
		changeOpac(0, layera)
		oImg.style.backgroundImage = src;
		opacity (layera,0,100,(dur*1000));
	}

	if (n < m) {n++} else {n=0}
	delay = t * 1000;
	setTimeout("portfolioAnim("+n+",'"+img+"','"+imgid+"',"+m+","+t+");", delay);
}


var filters = [
//"progid:DXImageTransform.Microsoft.RadialWipe(Duration=2)"
//,
//"progid:DXImageTransform.Microsoft.GradientWipe(Duration=2)",
//"progid:DXImageTransform.Microsoft.Fade(Duration=2)"
"progid:DXImageTransform.Microsoft.GradientWipe(Duration=2)"
];
var Nfilter = filters.length;

function swappic(img, wsiz, hsiz) {
//function swappic(img) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/gallerypics/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		n = Math.floor(Math.random()*(Nfilter));
		filterFunctionName = filters[n];
		oImg.style.filter = filterFunctionName;
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
}

function swappic2(img, wsiz, hsiz) {
//function swappic(img) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/gallery2/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		n = Math.floor(Math.random()*(Nfilter));
		filterFunctionName = filters[n];
		oImg.style.filter = filterFunctionName;
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
}

function swappic3(img, wsiz, hsiz) {
//function swappic(img) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/gallery3/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		n = Math.floor(Math.random()*(Nfilter));
		filterFunctionName = filters[n];
		oImg.style.filter = filterFunctionName;
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
}

function swappicnew(img, wsiz, hsiz) {
//function swappic(img) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/newgallery/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		n = Math.floor(Math.random()*(Nfilter));
		filterFunctionName = filters[n];
		oImg.style.filter = filterFunctionName;
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
}

function swappicgal(img, wsiz, hsiz) {
//function swappic(img) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/gallerypics/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		n = Math.floor(Math.random()*(Nfilter));
		filterFunctionName = filters[n];
		oImg.style.filter = filterFunctionName;
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
}

function swappic_popup(img, wsiz, hsiz) {
	var result = img.split("/");
	filename = result[result.length-1]
	src = "url(/images/gallerypics/"+filename+")";
	oImg = document.getElementById("mainpic")
	oImg2 = document.getElementById("blankMain")
	if (msie) {
		oImg.style.filter = "progid:DXImageTransform.Microsoft.Fade(Duration=2)";
	    oImg.filters[0].apply();
	 	oImg.style.backgroundImage = src;
		oImg.filters[0].play();
	} else {
		oImg.style.backgroundImage = src;
	}
	oImg.style.width = wsiz; oImg.style.height = hsiz;
	oImg2.style.width = wsiz; oImg2.style.height = hsiz;
	changeobj('popup','visible');
}


function closepop () {
	changeobj('popup','hidden');
}

function changeobj(obj, status, dur) {
	docObj = document.getElementById(obj);
	if (msie) {
		docObj.style.filter = "progid:DXImageTransform.Microsoft.Fade(Duration="+dur+")";
		docObj.filters[0].apply();
		docObj.style.visibility = status;
		docObj.filters[0].play();
	} else {
		if (status == "hidden") {
			opacity(obj,100,0,dur*1000)
			docObj.style.visibility = "hidden";
		}
		if (status == "visible") {
			if (docObj.style.visibility == "hidden") {
				changeOpac(0, obj);
				docObj.style.visibility = "visible";
			}
			opacity(obj,0,100,dur*1000);

		}
		
	}
}

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 + ")";
}