function $(id){
    return document.getElementById(id);
}
String.prototype.Trim= function(){ return this.replace(/(^\s*)|(\s*$)/g, ""); }
var varPatternNum = /^\d+(\.)?\d*$/;//数字
var varPatternDate = /(\d{4})-(\d{1,2})-(\d{1,2})/;//日期@"(\d{4})-(\d{1,2})-(\d{1,2})"

function check_msg_send(){
    if($('msg_content').value.Trim()==''){
        alert('请输入留言内容!');
        $('msg_content').focus();
        return false;
    }
    if($('msg_content').value.length>500){
        alert('请将留言内容的长度控制在500个字符以内!');
        $('msg_content').focus();
        return false;
    }
    return true;
}

function addfavorite()
{if (document.all){
   window.external.addFavorite('http://www.68jd.com/','机电商务网');}
   else if (window.sidebar)
   { window.sidebar.addPanel('机电商务网', 'http://www.68jd.com/', "");}
} 

function so(){
    if($('k').value.Trim()==''){
        alert('请输入搜索关键词！');
        $('k').focus();
        return;
    }
	var st=document.all.s_type;
	var sts=-1;
	for(var i=0;i<st.length;i++){
		if(st[i].checked)
			sts=st[i].value;
	}
	if(sts==-1){
		alert('请选择搜索类别！');
		return;
	} 
	var url='so.aspx';
	//
	if(sts==2)
		url='so2.aspx';
	else if(sts==3)
		url='soproduct.aspx';
	else if(sts==4)
		url='soCompany.aspx';
	else if(sts==5)
		url='so3.aspx';
	else if(sts==6)
		url='exhibtlist.aspx';
	else if(sts==7)
		url='soPrice.aspx';
	//
    window.location.href=url+'?k='+$('k').value+'&type='+sts;
}
function do_so(page){
	var url=page+'?k='+$('keyword').value+'&province='+$('province').value+'&city='+$('city').value+'&district='+$('district').value+'&days='+$('days').value+'&vip='+($('vip').checked?'1':'');
	window.location.href=url;
}