var img_src=new Array();
	var pruhled=new Array();
	var kam=new Array();
	
	function change_img(i1,i2){		
		if(!kam[i1]){
			kam[i1]="dolu";
			if(!pruhled[i1])pruhled[i1]=100;
		}
		var index1=document.getElementById(i1);
		var index2=document.getElementById(i2);
		if(!img_src[i1])img_src[i1]=index1.src;
		if(kam[i1]=="dolu")pruhled[i1]-=2;
		else pruhled[i1]+=2;
		if(index1){
			if(navigator.appName=="Microsoft Internet Explorer") index1.filters.Alpha.opacity = pruhled[i1];
			else {
				if(kam[i1]=="dolu")pruhled[i1]=0;
				else pruhled[i1]=100;
				if(index1.src==index2.src)index1.src=img_src[i1];
				else index1.src=index2.src;
			}
		}
		if(index2){
			if(navigator.appName=="Microsoft Internet Explorer") index2.filters.Alpha.opacity = 100-pruhled[i1];
		}	
		if(pruhled[i1]>0 && pruhled[i1]<100) {
			window.setTimeout("change_img('"+i1+"','"+i2+"');", 50);
		}else{
			if(pruhled[i1]>=100)	kam[i1]="dolu";
			if(pruhled[i1]==0)	kam[i1]="nahoru";
			window.setTimeout("change_img('"+i1+"','"+i2+"');", 2*1000); 
		}		
	}