$(document).ready(function(){
		var url = document.URL;
		var arr = url.split("/");
		if(arr.length>4){
			var dir = arr[4];
			var str = dir.substring(dir.length-12,dir.length);
			
			$("#mainimg img").attr("src","/design/hourin/img/item_t/"+str+".jpg");
		}
});