function change_lmenu(menu_id,total_menu){
	for(var i=1;i<=total_menu;i++){
		var obj = document.getElementById("lmenu_p_"+i);
		if(obj!=null&&obj!='undefined'){
			if(i==menu_id){
				obj.className='ys_1';
			}else{
				obj.className='ys_2';
			}
		}
		var tobj = document.getElementById("lmenu_"+i);
		if(i==menu_id){
			tobj.style.display='';
		}else{
			tobj.style.display='none';
		}
	}
	return false;
}

function change_cmenu(obj){
	var childs = obj.parentNode.childNodes;
	for(var i=0;i<childs.length;i++){
		if(childs[i]==obj){
			childs[i].className="ys_4";
		}else{
			childs[i].className="on_yss";
		}
	}
}

function change_cmenu2(obj){
	var childs = obj.parentNode.childNodes;
	for(var i=0;i<childs.length-1;i++){
		if(childs[i]==obj){
			childs[i].className="djlb_right";
		}else{
			childs[i].className="djlb_rights";
		}
	}
}

/*
*tid:目标框,flag:add|reduce,min：最小值,max:最大值
*/
function regulator(tid,op,min,max){
	var tobj = document.getElementById(tid);
	if(tobj==null||tobj=='undefined'){
		return;
	}
	var val = tobj.value;
	if(val==""){
		val = 1;
		tobj.value = val;
		return;
	}
	if(isNaN(val)){
		alert("请输入正确的数量");return;
	}
	switch(op){
		case 'add':
			val++;
			if(max!=null){
				if(val>max){
					alert("数量不能大于"+max+"!");return;
				}
			}
			break;
		case 'reduce':
			val--;
			if(min!=null){
				if(val<min){
					alert("数量不能小于"+min+"!");return;
				}
			}			
			break;
	}
	tobj.value = val;
	return false;
}