for(var?i?=?0;?i?<?tr.length;?i++)?{
		tr[i].onclick=function(e){
			e?=?e?||?window.event;
			var?el?=?e.srcElement;
			var?cls?=?el.className;
			var?input?=?this.getElementsByTagName('input')[1];
			var?raduce?=?this.getElementsByTagName('span')[1]
			var?val?=?parseInt(input.value)
			switch?(cls)?{
				case?'add':
					input.value?=?val?+?1;
					raduce.innerHTML?=?'-'
					break;
				case?'raduce':
					if(val>1)?{
						input.value?=?val?-?1;
					}
					if(input.value<=1)?{
						raduce.innerHTML?=?''
					}
					break;
				default:
					break;
			}
		}
	}