var imgTotalNum = 0;
function cust_preloadImages() {
  var d=document; 
  if(d.images) { 
  	if(!d.imgArr) 
		d.imgArr=new Array();
    var i,j=d.imgArr.length,a=cust_preloadImages.arguments; 
	for(i=0; i<a.length; i++) {
		d.imgArr[j]=new Image(); 
		d.imgArr[j++].src='images/'+a[i];
	}
	imgTotalNum = j;
  }
//  for (var k=0;k<d.imgArr.length;k++)
//	  alert(d.imgArr[k].src);
}

function shadow_Resize(size){
	var d =document;
	var imgs=d.getElementsByTagName('img');
	var shaRight=imgs['shadowRight'];
	var shaBot=imgs['shadowBot'];
	switch(size){
		case 't' : 	shaRight.height=350;
					shaBot.width=235;
					break;
		case 's' :	shaRight.height=235;
					shaBot.width=350;
					break;
		default : break;
	}
}

function change_img(add)
{
	var d = document;
	var dim = document.getElementById('divImg');
	var swapImg = dim.getElementsByTagName('img')['tokenImg'];
	var digitArr='0123456789';
	var newImgInd=0;
	for (var a=swapImg.src,tmpInd=0,j;(j=a.indexOf('.'))!=-1;a=a.substr(j+1)){
		tmpInd+=j;
	}
	if (tmpInd!=0){
		var imgInd;
		if (digitArr.indexOf(swapImg.src.charAt(tmpInd-1))!=-1){
			imgInd=parseInt(swapImg.src.substr(tmpInd-1,2));
		} else {
			imgInd=parseInt(swapImg.src.charAt(tmpInd));
		}
		newImgInd=imgInd+parseInt(add);
	}
	if (newImgInd>=imgTotalNum){
		newImgInd=0;
	} else if (newImgInd<0){
		newImgInd=imgTotalNum-1;
	}
	swapImg.src=d.imgArr[newImgInd].src;
	if (d.imgArr[newImgInd].height>300){
		shadow_Resize('t');
	} else {
		shadow_Resize('s');
	}
}

function show(ind){
	var d = document;
	var dim = d.getElementById('divImg');
	var img = dim.getElementsByTagName('img')['tokenImg'];
	dim.className = 'show';
	img.src = d.imgArr[ind].src;
	if (d.imgArr[ind].height>300){
		shadow_Resize('t');
	} else {
		shadow_Resize('s');
	}
}

function hide(){
	var dim = document.getElementById('divImg');
	dim.className = 'hide';
}