function win(name, url, width, height) {
	if(width=='mp3'){
		var	width=400;
		var	height=200;	
	}else{
		var	width=800;
		var	height=650;
	}
	var left = screen.availWidth/2 - width/2;
	var top = screen.availHeight/2 - height/2;
	window.open(url,name,'width=' + width + ',height=' + height + ',resizable=1,scrollbars=yes,menubar=no,left='+left+',top='+top);
}
function changeImage(s){
	document.getElementById('item_image').src=s;
}
function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}