var curImg = 0;
var timerId = -1;
var interval = 3500;
var imgIsLoaded = false;
var begImg  = 0;
var current_transition = 15;
var flag = true;
var bFirst = false;
var intervalm=3000;
 var agt=navigator.userAgent.toLowerCase();

    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
   
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    // KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
    // or if this is the first browser window opened.  Thus the
    // variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_aol5  = (agt.indexOf("aol 5") != -1);
    var is_aol6  = (agt.indexOf("aol 6") != -1);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
    var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

    var is_webtv = (agt.indexOf("webtv") != -1); 

    var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
    var is_AOLTV = is_TVNavigator;

    var is_hotjava = (agt.indexOf("hotjava") != -1);
    var is_hotjava3 = (is_hotjava && (is_major == 3));
    var is_hotjava3up = (is_hotjava && (is_major >= 3));

    // *** JAVASCRIPT VERSION CHECK ***
    var is_js;
    if (is_nav2 || is_ie3) is_js = 1.0;
    else if (is_nav3) is_js = 1.1;
    else if (is_opera5up) is_js = 1.3;
    else if (is_opera) is_js = 1.1;
    else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
    else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
    else if (is_hotjava3up) is_js = 1.4;
    else if (is_nav6 || is_gecko) is_js = 1.5;
    // NOTE: In the future, update this code when newer versions of JS
    // are released. For now, we try to provide some upward compatibility
    // so that future versions of Nav and IE will show they are at
    // *least* JS 1.x capable. Always check for JS version compatibility
    // with > or >=.
    else if (is_nav6up) is_js = 1.5;
    // NOTE: ie5up on mac is 1.4
    else if (is_ie5up) is_js = 1.3

    // HACK: no idea for other browsers; always check for JS version with > or >=
    else is_js = 0.0;

    // *** PLATFORM ***
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
    //        Win32, so you can't distinguish between Win95 and WinNT.
    var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));

    // is this a 16 bit compiled version?
    var is_win16 = ((agt.indexOf("win16")!=-1) || 
               (agt.indexOf("16bit")!=-1) || (agt.indexOf("windows 3.1")!=-1) || 
               (agt.indexOf("windows 16-bit")!=-1) );  

    var is_win31 = ((agt.indexOf("windows 3.1")!=-1) || (agt.indexOf("win16")!=-1) ||
                    (agt.indexOf("windows 16-bit")!=-1));

    var is_winme = ((agt.indexOf("win 9x 4.90")!=-1));
    var is_win2k = ((agt.indexOf("windows nt 5.0")!=-1));

    // NOTE: Reliable detection of Win98 may not be possible. It appears that:
    //       - On Nav 4.x and before you'll get plain "Windows" in userAgent.
    //       - On Mercury client, the 32-bit version will return "Win98", but
    //         the 16-bit version running on Win98 will still return "Win95".
    var is_win98 = ((agt.indexOf("win98")!=-1) || (agt.indexOf("windows 98")!=-1));
    var is_winnt = ((agt.indexOf("winnt")!=-1) || (agt.indexOf("windows nt")!=-1));
    var is_win32 = (is_win95 || is_winnt || is_win98 || 
                    ((is_major >= 4) && (navigator.platform == "Win32")) ||
                    (agt.indexOf("win32")!=-1) || (agt.indexOf("32bit")!=-1));

    var is_os2   = ((agt.indexOf("os/2")!=-1) || 
                    (navigator.appVersion.indexOf("OS/2")!=-1) ||   
                    (agt.indexOf("ibm-webexplorer")!=-1));

    var is_mac    = (agt.indexOf("mac")!=-1);
    // hack ie5 js version for mac
    if (is_mac && is_ie5up) is_js = 1.4;
    var is_mac68k = (is_mac && ((agt.indexOf("68k")!=-1) || 
                               (agt.indexOf("68000")!=-1)));
    var is_macppc = (is_mac && ((agt.indexOf("ppc")!=-1) || 
                                (agt.indexOf("powerpc")!=-1)));

    var is_sun   = (agt.indexOf("sunos")!=-1);
    var is_sun4  = (agt.indexOf("sunos 4")!=-1);
    var is_sun5  = (agt.indexOf("sunos 5")!=-1);
    var is_suni86= (is_sun && (agt.indexOf("i86")!=-1));
    var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
    var is_irix5 = (agt.indexOf("irix 5") !=-1);
    var is_irix6 = ((agt.indexOf("irix 6") !=-1) || (agt.indexOf("irix6") !=-1));
    var is_hpux  = (agt.indexOf("hp-ux")!=-1);
    var is_hpux9 = (is_hpux && (agt.indexOf("09.")!=-1));
    var is_hpux10= (is_hpux && (agt.indexOf("10.")!=-1));
    var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
    var is_aix1  = (agt.indexOf("aix 1") !=-1);    
    var is_aix2  = (agt.indexOf("aix 2") !=-1);    
    var is_aix3  = (agt.indexOf("aix 3") !=-1);    
    var is_aix4  = (agt.indexOf("aix 4") !=-1);    
    var is_linux = (agt.indexOf("inux")!=-1);
    var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
    var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
    var is_mpras    = (agt.indexOf("ncr")!=-1); 
    var is_reliant  = (agt.indexOf("reliantunix")!=-1);
    var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
           (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
           (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
    var is_sinix = (agt.indexOf("sinix")!=-1);
    var is_freebsd = (agt.indexOf("freebsd")!=-1);
    var is_bsd = (agt.indexOf("bsd")!=-1);
    var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 
                 is_sco ||is_unixware || is_mpras || is_reliant || 
                 is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

    var is_vms   = ((agt.indexOf("vax")!=-1) || (agt.indexOf("openvms")!=-1));
 // - IE5.5 and up can do the blending transition.
var browserCanBlend = (is_ie5_5up);
 /* show the blend select if appropriate */
var transitions = new Array;
transitions[0] = "progid:DXImageTransform.Microsoft.Fade(duration=1)";
transitions[1] = "progid:DXImageTransform.Microsoft.Blinds(Duration=1,bands=20)";
transitions[2] = "progid:DXImageTransform.Microsoft.Checkerboard(Duration=1,squaresX=20,squaresY=20)";
transitions[3] = "progid:DXImageTransform.Microsoft.Strips(Duration=1,motion=rightdown)";
transitions[4] = "progid:DXImageTransform.Microsoft.Barn(Duration=1,orientation=vertical)";
transitions[5] = "progid:DXImageTransform.Microsoft.GradientWipe(duration=1)";
transitions[6] = "progid:DXImageTransform.Microsoft.Iris(Duration=1,motion=out)";
transitions[7] = "progid:DXImageTransform.Microsoft.Wheel(Duration=1,spokes=12)";
transitions[8] = "progid:DXImageTransform.Microsoft.Pixelate(maxSquare=10,duration=1)";
transitions[9] = "progid:DXImageTransform.Microsoft.RadialWipe(Duration=1,wipeStyle=clock)";
transitions[10] = "progid:DXImageTransform.Microsoft.RandomBars(Duration=1,orientation=vertical)";
transitions[11] = "progid:DXImageTransform.Microsoft.Slide(Duration=1,slideStyle=push)";
transitions[12] = "progid:DXImageTransform.Microsoft.RandomDissolve(Duration=1,orientation=vertical)";
transitions[13] = "progid:DXImageTransform.Microsoft.Spiral(Duration=1,gridSizeX=40,gridSizeY=40)";
transitions[14] = "progid:DXImageTransform.Microsoft.Stretch(Duration=1,stretchStyle=push)";
transitions[15] = "special case";
var transition_count = 15;
//var current_transition =1;
var arrPreload = new Array();
var _PRELOADRANGE = 5;
var buttonImgPfx ="/img/photoV2/";
var buttonOffArray= new Array("bo_03_3.gif",
			      "bo_04_2.gif",
			      "bo_05_2.gif",
			      "bo_06_2.gif"
			      );
var buttonOnArray = new Array("bo_03_4.gif",
			      "bo_04_1.gif",
			      "bo_05_1.gif",
			      "bo_06_1.gif"
			       );
 
function change_transition() 
{
	current_transition = document.all.transitionType.selectedIndex;
	//alert(current_transition);
	if(current_transition == 0)
		current_transition = 15;
	else
		current_transition--;
}


function changeSpeed(sidx)
{
    
    interval=5500-sidx*500;
    if (timerId != -1) 
	{
		window.clearInterval(timerId);
		timerId = window.setInterval("forward();", interval);
    }
}


var arrPreload = new Array();
var _PRELOADRANGE = 5;




function preloadRange(intPic,intRange) {
	var divStr = "";
	for (var i=intPic; i<(intPic+intRange); i++) {
		arrPreload[i] = new Image();
		arrPreload[i].src = imageSrcArray[i];	
	} 
		
	if(!bFirst)
	{
		if (browserCanBlend) 
		{
			//var divTrans = '<select name="transitionType" size=1  onchange="change_transition()" class="list1" ><option value=15 selected>???ú??ê?</option> <option value=0 >?ìo?D§1?</option> <option value=1 >°ùò?′°</option> <option value=2 >???ìD§1?</option> <option value=3 >D±ê?D§1?</option> <option value=4 >?a????é?</option> <option value=5 >2á3yD§1?</option> <option value=6 >o?ê?D§1?</option> <option value=7 >·?3μD§1?</option> <option value=8 >2¨??μ′?ú</option> <option value=9 >ê±?ó×a?ˉ</option> <option value=10 >óê??D§1?</option> <option value=11 >???ˉ·?ê?</option> <option value=12 >???¨??ê?</option> <option value=13 >?ìDyê???</option> <option value=14 >éì?1·?ê?</option> </select> ';
			var divTrans = '<select name="transitionType" size=1  onchange="change_transition()" class="list1" ><option value=15 selected>?? ?ú</option> <option value=0 >?ì o?</option> <option value=1 >′° ê?</option> <option value=2 >?? ?ì</option> <option value=3 >D± ê?</option> <option value=4 >?? ê?</option> <option value=5 >2á 3y</option> <option value=6 >o? ê?</option> <option value=7 >·? 3μ</option> <option value=8 >2¨ ??</option> <option value=9 >ê± ?ó</option> <option value=10 >óê ??</option> <option value=11 >?? ?ˉ</option> <option value=12 >?? ?¨</option> <option value=13 >?ì Dy</option> <option value=14 >éì ?1</option> </select> ';
			//document.getElementById("div2").innerHTML = divTrans;
		}
		bFirst = true;
	}
	return false;
}

function ScaleImage(i)
{

	var iAvailableWidth = imageWidthArray;//span.clientWidth;;
	var iAvailableHeight = imageHeightArray;//span.clientHeight;
	// calculate the scale to use for the image. Note, the image
	// will never be stretched beyond it's actual width and height,
	// and thus the scale max is 1
	iFullImageWidth = imageWidthArray;
	iFullImageHeight = imageHeightArray;
	var flScale = Math.min(	1,Math.min((iAvailableWidth /iFullImageWidth),(iAvailableHeight /iFullImageHeight)));
	// set the width of the image
	var width = iScaledImageWidth = Math.round(iFullImageWidth * flScale);
	
	// set the height of the image
	var height = iScaledImageHeight = Math.round(iFullImageHeight * flScale);
	
	// center the image by adjusting it's left and top values
	var iLeft = Math.floor((iAvailableWidth - iScaledImageWidth) / 2);
	var iTop = Math.floor((iAvailableHeight - iScaledImageHeight) / 2);
	var style="style='HEIGHT: "+height+"; WIDTH: "+width+"'";
	return style;
	

}

function imgLoadNotify()
{
    imgIsLoaded = true;
}


function changeSlide(n)
{	
    if (document.all)
	{    	
		/* transistion effects */
		if (browserCanBlend)
		{
			var do_transition;
			if (current_transition == (transition_count)) 
			{
				do_transition = Math.floor(Math.random() * transition_count);
				
			} 
			else 
			{
				do_transition = current_transition;
				
			}
			 
			if(document.getElementById("imgp")!=null)
			{
			  
			  document.getElementById("imgp").style.filter=transitions[do_transition];
			  document.getElementById("imgp").filters[0].Apply();
			}			
		}
    	else
    	{
    	    if(document.getElementById("imgp")!=null)
    	    {
    		  document.getElementById("imgp").style.filter="blendTrans(Duration=1)";
    		  document.getElementById("imgp").filters.blendTrans.Apply();
    		}
    	}
    	
    }
    
    imgIsLoaded = false;
    var s = ScaleImage(curImg);
    var htmlCont = "<center><a href='"+imageIDsArray[curImg]+"' target=_blank title='点击查看详细信息'><img align=middle  src='" + imageSrcArray[curImg] + "'  border=0  class=uimg onload='imgLoadNotify();' "+s+" ></a><br><a class=gray3 href='"+imageIDsArray[curImg]+"' target=_blank title='点击查看详细信息'><span class=yphsmhdr style='position:relative; top:4px'>"+imageNameArray[curImg]+"</span></a></center>";
    if(document.getElementById("imgp")!=null)
    {
     document.getElementById("imgp").innerHTML = htmlCont ;

    }    
    if (document.all) 
    {	
       
        if(document.getElementById("imgp")!=null)
        {		
		   document.getElementById("imgp").filters[0].Play();
		}		
		
		
    }
		
}

function forward()
{
	imgIsLoaded = false;
		
	if (!arrPreload[curImg+1])
	{
		curImg++;
		if (curImg >= numImgs) 
		{ 
			curImg = 0;
			
		} 
	} 
	else 
	{
		curImg++;
		if (curImg >= numImgs) 
		{  
			curImg = 0;
		}
	}
	changeSlide();
}

function rewind()
{
	curImg--;
	if (curImg < 0)
	{
		curImg = numImgs-1;		
	}
	changeSlide();
}

function stop()
{
    window.clearInterval(timerId);
    timerId = -1;
    document.playbtn.src = buttonImgPfx + buttonOffArray[0];
    document.stopbtn.src = buttonImgPfx + buttonOnArray[1];
    imgIsLoaded = true;
}

function play()
{
    if (timerId == -1) 
		timerId = window.setInterval('forward();', interval);
    document.playbtn.src = buttonImgPfx + buttonOnArray[0];
    document.stopbtn.src = buttonImgPfx + buttonOffArray[1];
}

function setButton(direction)
{
	if (timerId != -1) { window.clearInterval(timerId); timerId = window.setInterval("forward();", interval); }
    imgIsLoaded = true;
    if (direction == 0) 
	{
		document.prevbtn.src = buttonImgPfx + buttonOnArray[2];
		window.setTimeout("document.prevbtn.src = buttonImgPfx + buttonOffArray[2];", 0);
    }
	else 
	{
		document.fowdbtn.src = buttonImgPfx + buttonOnArray[3];
		window.setTimeout("document.fowdbtn.src = buttonImgPfx + buttonOffArray[3];", 0);
    }
}