var IsCorrectPNG=false;
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 or higher.
{
	IsCorrectPNG=true;	
	for(var i=0; i<document.images.length; i++)
	{
		var img = document.images[i]
		var imgName = img.src.toUpperCase()
		if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
		{
			var imgID = (img.id) ? "id='" + img.id + "' " : ""
			var imgClass = (img.className) ? "class='" + img.className + "' " : ""
			var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
			var imgStyle = "display:inline-block;" + img.style.cssText
			var imgAttribs = img.attributes;
			for (var j=0; j<imgAttribs.length; j++)
			{
				var imgAttrib = imgAttribs[j];
				if (imgAttrib.nodeName == "align")
				{
					if (imgAttrib.nodeValue == "left") imgStyle = "float:left;" + imgStyle
					if (imgAttrib.nodeValue == "right") imgStyle = "float:right;" + imgStyle
					break
				}
			}
			var strNewHTML = "<span " + imgID + imgClass + imgTitle
			strNewHTML += " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
			strNewHTML += "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
			strNewHTML += "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"
			img.outerHTML = strNewHTML
			i = i-1
		}
	}
	
	checkCursor();
	
	
}
window.attachEvent("onload", correctPNG);
//window.attachEvent("onload", checkCursor);


function rolloverPNG() // correctly handle PNG transparency in Win IE 5.5 or higher.
{
	var a=rolloverPNG.arguments;
	if (IsCorrectPNG){
		var img = document.getElementById(a[0]);
		img.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'" + a[2] + "\', sizingMethod='scale')";
	} else {
		MM_swapImage(a[0],a[1],a[2],a[3]);
	}
		
}

function restorePNG() // correctly handle PNG transparency in Win IE 5.5 or higher.
{
	var a=restorePNG.arguments;
	if (IsCorrectPNG){
		var img = document.getElementById(a[0]);
		img.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'" + a[2] + "\', sizingMethod='scale')";
	} else {
		MM_swapImgRestore();
	}
		
}

//=========================
function changeImage(mode){
	
	var btnR = document.getElementById("btnRight");
	var btnL = document.getElementById("btnLeft");	
	if (mode == "next") {
		if (intCurrent < totalImage) {
			intCurrent ++;
			
			var img = document.getElementById("mainImage");
			img.src = arrImage[intCurrent-1];
			document.getElementById("counter").innerHTML=intCurrent+" of "+totalImage ;
		} 
	} else if (mode == "prev") {
		if (intCurrent > 1) {
			intCurrent --;
			var img = document.getElementById("mainImage");
			img.src = arrImage[intCurrent-1];
			document.getElementById("counter").innerHTML=intCurrent+" of "+totalImage ;
		}
	}
	
	//=== for IE ===
	if (intCurrent >= totalImage) {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-blue0.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-blue1.gif', sizingMethod='scale')";
				btnR.style.cursor = "default";
				btnL.style.cursor = "pointer";
			} else {
					btnR.src = 'img/right-blue0.gif';
					btnL.src = 'img/left-blue1.gif';
					
//					return void(0);
				}
	} else if (intCurrent <= 1) {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-blue1.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-blue0.gif', sizingMethod='scale')";
				btnR.style.cursor = "pointer";
				btnL.style.cursor = "default";
			} else {
					btnR.src = 'img/right-blue1.gif';
					btnL.src = 'img/left-blue0.gif';
//					return false;
				}
				
	} else {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-blue1.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-blue1.gif', sizingMethod='scale')";
				btnR.style.cursor = "pointer";
				btnL.style.cursor = "pointer";
				//alert(btnL.style.cursor);
			} else {
					btnR.src = 'img/right-blue1.gif';
					btnL.src = 'img/left-blue1.gif';
			}
	}
	
}

//================================
function changeImageFile(mode, imgFile){
	
	var btnR = document.getElementById("btnRight");
	var btnL = document.getElementById("btnLeft");	
	if (mode == "next") {
		if (intCurrent < totalImage) {
			intCurrent ++;
			
			var img = document.getElementById("mainImage");
			img.src = arrImage[intCurrent-1];
			document.getElementById("counter").innerHTML=intCurrent+" of "+totalImage ;
		} 
	} else if (mode == "prev") {
		if (intCurrent > 1) {
			intCurrent --;
			var img = document.getElementById("mainImage");
			img.src = arrImage[intCurrent-1];
			document.getElementById("counter").innerHTML=intCurrent+" of "+totalImage ;
		}
	}
	
	//=== for IE ===
	if (intCurrent >= totalImage) {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-"+imgFile+"0.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-"+imgFile+"1.gif', sizingMethod='scale')";
				btnR.style.cursor = "default";
				btnL.style.cursor = "pointer";
				
			} else {
					btnR.src = 'img/right-'+imgFile+'0.gif';
					btnL.src = 'img/left-'+imgFile+'1.gif';
//					return void(0);
				}
	} else if (intCurrent <= 1) {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-"+imgFile+"1.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-"+imgFile+"0.gif', sizingMethod='scale')";
				btnR.style.cursor = "pointer";
				btnL.style.cursor = "default";
			} else {
					btnR.src = 'img/right-'+imgFile+'1.gif';
					btnL.src = 'img/left-'+imgFile+'0.gif';
//					return false;
				}
				
	} else {
			if (IsCorrectPNG){
				btnR.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/right-"+imgFile+"1.gif', sizingMethod='scale')";
				btnL.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='img/left-"+imgFile+"1.gif', sizingMethod='scale')";
				btnR.style.cursor = "pointer";
				btnL.style.cursor = "pointer";
			} else {
					btnR.src = 'img/right-'+imgFile+'1.gif';
					btnL.src = 'img/left-'+imgFile+'1.gif';
			}
	}
	
}

function checkCursor() {
//======init=======//

	var srcR, srcL;
	
	if (IsCorrectPNG){
		
		var btnR = document.getElementById("btnRight");
		var btnL = document.getElementById("btnLeft");
		if (btnR) {
				if (totalImage > 1) {
						btnR.style.cursor = "pointer";
				} else {
						srcR =btnR.style.filter.toString();
						srcR = srcR.replace('1.gif','0.gif');	
						 btnR.style.filter = srcR;
						 
				}
		}
		
		if (btnL) {
				srcL =btnL.style.filter.toString();
				srcL = srcL.replace('1.gif','0.gif');	
				btnL.style.filter = srcL;
		}
		
	}
}