//----------------------------------------------------------------------------
// 比较商品
//----------------------------------------------------------------------------

function productCompare()
{
	var form = document.productCompare;
	var BiJiao_1 = null;
	var BiJiao_2 = null;
	var count = 0;
	
	if( form.BiJiao.length ) {
		for (i=0;i<form.BiJiao.length;i++)
			if( form.BiJiao[i].checked == true ) {
				count++;
				if( count < 2 )
					BiJiao_1 = form.BiJiao[i].value;
				else
					BiJiao_2 = form.BiJiao[i].value;
			}
	}

	if( count != 2 ) {
		alert("操作错误，原因可能是：\n要进行比较必须选定2件商品！");
	} else {
		form.action = "/ProCompare.Asp?BiJiaoA="+BiJiao_1+"&BiJiaoB="+BiJiao_2+"";
		form.target = "_blank";
		form.submit();
	}

}