// JavaScript Document

	function showTab(num){
		var as = document.getElementById('tab').getElementsByTagName('span');
		for(i=0;i<as.length;i++){
			as[i].className = '';
			//document.getElementById('content'+(i+1)).style.display = 'none';
		}
		var items = document.getElementsByName("content");
		if(items == null || items.length <= 0)
			items = getElementsByName("div","content");
		if(items) { 
			for(var i = 0;i<items.length;i++) {  
				if(i == num - 1) { 
					items[i].style.display="block";
				}
				else  
					items[i].style.display="none";
			}
		}
		document.getElementById('a'+num).className = 'active';  
	}
	
	
	
	/*²úÆ·Ê×Ò³Tab*/
	
		function goodsTab(num){
		var as= document.getElementById('goodstab').getElementsByTagName('span');
		for(i=0;i<as.length;i++){
			as[i].className = '';
			document.getElementById('goodscontent'+(i+1)).style.display = 'none';
		}
		document.getElementById('goods'+num).className = 'current';
		document.getElementById('goodscontent'+num).style.display = '';
		
	}
	
	function getElementsByName(tag,eltname){ 

		var elts = document.getElementsByTagName(tag); 
		var count = 0; 
		var elements = []; 
		for(var i=0;i<elts.length;i++){ 
		 if(elts[i].getAttribute("name")==eltname){ 
			elements[count]=elts[i];
			count++;
		 } 
		} 
		return elements; 
	}