// JavaScript Document
function checkform(formStr){
	if(document.forms[formStr].membername.value=="" || Trim(document.forms[formStr].membername.value)==""){
		alert("请输入 用户名！");
		document.forms[formStr].membername.focus();
		return false;
	}
	if(document.forms[formStr].pwd.value=="" || Trim(document.forms[formStr].pwd.value)==""){
		alert("请输入 密码！");
		document.forms[formStr].pwd.focus();
		return false;
	}
	return true;
}
function seacthForm(formStr){
	if(document.forms[formStr].keywords.value=="" || Trim(document.forms[formStr].keywords.value)==""){
		alert("请输入 关键字！");
		document.forms[formStr].keywords.focus();
		return false;
	}
	return true;
}


function checkEmail(email)
{//用JavaScript正则表达式验证Email格式
        var reEmail = /^([A-Za-z0-9])(\w)+@(\w)+(\.)(com|com\.cn|net|cn|net\.cn|org|biz|info|gov|gov\.cn|edu|edu\.cn)/;
        if (!email.match(reEmail)&&email!="")
        {
                //alert('Email必须符合要求!');
                return false;
        }
        else return true;
}

function LTrim(str)

{
    var whitespace = new String(" \t\n\r");
    var s = new String(str);
    if (whitespace.indexOf(s.charAt(0)) != -1)
    {
        var j=0, i = s.length;
        while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
        {
            j++;
        }
        s = s.substring(j, i);
    }
    return s;
}
function RTrim(str)
{
    var whitespace = new String(" \t\n\r");
    var s = new String(str);
    if (whitespace.indexOf(s.charAt(s.length-1)) != -1)
    {
        var i = s.length - 1;
        while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
        {
            i--;
        }
        s = s.substring(0, i+1);
    }
    return s;
}
function Trim(str)
{
    return RTrim(LTrim(str));
}