function settype(obj)
{
	if(obj.value=="jx")
	{
		$("#sea").attr("action","/search/so")
		//alert($("#sea").attr("action"));
	}
	if(obj.value=="pj")
	{
		$("#sea").attr("action","/search/searchok.aspx")
		//alert($("#sea").attr("action"));
	}
	if(obj.value=="jl")
	{
		$("#sea").attr("action","/teacher/result")
		//alert($("#sea").attr("action"));
	}
	if(obj.value=="bbs")
	{
		$("#sea").attr("action","/search/bbs.aspx")
	}
	if(obj.value=="dp")
	{
		$("#sea").attr("action","/search/dp.aspx")
	}
}



function isMaxLen(o)
{
	var nMaxLen=o.getAttribute? parseInt(o.getAttribute("maxlength")):"";
	if(o.getAttribute && o.value.length>nMaxLen)
	{
		o.value=o.value.substring(0,nMaxLen);
		alert('你输入超出了限制');
	}
}

//限制输入字符
function check(str,chkStr) //判断输入的字符
{ 
    var i; 
    var len = str.length; 
    //var chkStr = "aaaaaaa"; 
    if (len == 1) 
    { 
        if (chkStr.indexOf(str.charAt(i)) < 0) 
        { 
            return false; 
        } 
    } 
    else 
    { 
        if ((chkStr.indexOf(str.charAt(0)) < 0)) 
        { 
            return false; 
        } 
        for (i = 1; i < len; i++) 
        { 
            if (chkStr.indexOf(str.charAt(i)) < 0) 
            { 
                return false; 
            } 
        } 
    } 
    return true; 
}
function restrict(type,obj,chkstr,alerts)//类型,obj,判断内容,提示信息
{
    if (type==1)
    {
        if(!check(obj.value,chkstr))
        {
			obj.value=obj.value.substring(0,obj.value.length-1);
            alert(alerts);
        }
    }
}
//限制输入字符结束