function go1_click()
{
    if (form1.class_id.value == '0')
 	{
	 	alert('请先选择一个分类。');
	   	return false;
	}
    else
    	form1.submit();
}

function go2_click()
{
    if (form2.key_word.value == '按关键字查询')
 	{
	 	alert('请先输入您想查询的关键字。');
	   	return false;
	}
    else
    form2.submit();
}

function go3_click()
{
    if (form3.c_id.value == 0)
 	{
	 	alert('请选择品牌。');
	   	return false;
	}
    else
    form3.submit();
}


function sp(url,width,height){
window.open(url, '_blank', 'noclose=1,toolbar=0,menubar=0,status=0,width='+width+',height='+height+',left='+ ((screen.width - width) /2) + ',top=' + ((screen.height - height) / 2 - 28) + ',resizable=1,scrollbars=0');
}

function opendoc(url,width,height){
window.open(url, '_blank', 'noclose=1,toolbar=0,menubar=0,status=0,width='+width+',height='+height+',left='+ ((screen.width - width) /2) + ',top=' + ((screen.height - height) / 2 - 28) + ',resizable=1,scrollbars=1');
}