String.prototype.trim = function()
{
    // 用正则表达式将前后空格

    // 用空字符串替代。

    return this.replace(/(^\s*)|(\s*$)/g, "");
}
/*
'**************************************************
'Function		去空格

'Author			Peace
'Create	Date	2004-09-09
'Parameter		Str				需要去空格的字符串
'**************************************************
*/
function KillSpace(Str,list){
		if(typeof(list) == 'undefined')
			list = ' ';
			
		while((Str.length>0) && list.indexOf(Str.charAt(0))!=-1 )
			 Str = Str.substring(1,Str.length);
		while((Str.length>0) && list.indexOf(Str.charAt(Str.length-1))!=-1)
		     Str = Str.substring(0,Str.length-1);
		
        return Str;
}
/*
'**************************************************
'Function		判断FORM TEXT输入是否正确
'Author			Peace
'Create	Date	2004-09-09
'Parameter		Obj				Form object
'				TypeValue		检测类型

'				Msg				提示信息
'**************************************************
*/
function CheckTextB(Obj,TypeValue,Msg)
{
	//TypeValue 2数字类型  8 字符型  100汉字
	//Obj 判断对象
	//Msg 返回内容
	var IsOk=false;
	switch (TypeValue)
	{
		case 2:
			res=/\d{1,}/
			Obj.value=KillSpace(Obj.value);
			if (res.exec(Obj.value))
				IsOk=true;
			else
				IsOk=false;
			if (!IsOk && (Msg.length>0 || Obj.value.length>0))
				{
					if (Obj.style.display == '')
					{
						alert(Msg);
						Obj.focus();
						Obj.select();
					}
					return false;
				}
			else
				return true;
			break;
		case 8:
			Obj.value=KillSpace(Obj.value);
			if (Obj.value.length==0)
				IsOk=true;
			else
				IsOk=false;
			if (IsOk && Msg.length>0)
				{
					alert(Msg);
					if (Obj.style.display == '')
					{
						Obj.focus();
						Obj.select();
					}
					return false;
				}
			else
				return true;
			break;
		case 100:
			Obj.value=KillSpace(Obj.value);
			if (Obj.value.length==0 || !GB_All(Obj.value) )
				IsOk=true;
			else
				IsOk=false;
			if (IsOk && Msg.length>0)
				{
					alert(Msg);
					alert(Obj.style.display);
					if (Obj.style.display == '')
					{
						Obj.focus();
						Obj.select();
					}
					return false;
				}
			else
				return true;
			break;
	
	}
}
/*
'**************************************************
'Function		判断FORM TEXT输入是否正确
'Author			Peace
'Create	Date	2004-09-09
'Parameter		Obj				Form object
'				TypeValue		检测类型

'				Msg				提示信息
'				Necessary		是否是必添字段

'**************************************************
*/
function CheckText(Obj,TypeValue,Msg,Necessary)
{
    /*TypeValue 
    'd': Numeric; 
    'i': All Integer 
    'r': Aeal Number
    'f': Decimal Fraction
    'l': 26 letter
    'ul':[A-Z]
    'll':[a-z]
    'w': [a-zA-Z_0-9]
    'S': Chinese Characters and Special Characters
    'e':email
	'date':
    
    Obj Required. 
    Msg Return Prompt Message
    Necessary is Optional Parameter
    */
    
    if (isNaN(Necessary))
        Necessary=false;
    Obj.value=KillSpace(Obj.value);
    switch (TypeValue)
    {
        case "d":
            res=new RegExp("^[0-9]+$","g");
            break;
        case "i":
            //res=new RegExp("(^[1-9][0-9]*$)|(^[\+\-][1-9][0-9]*$)","g");
			res=new RegExp("^[\+\-]?[0-9]+$","g");
            break
        case "r":
            //res=new RegExp("(^([\+\-]?[1-9])[0-9]*(\.[0-9]+)?[0-9]$)|(^([\+\-]?[0-9]\.)[0-9]+$)","g")
			res=new RegExp("^[\+\-]?[0-9]+(\.)?[0-9]?$","g")
            break;
        case "f":
            //res=new RegExp("(^(0\.)[0-9]+$)|(^[\+\-]0\.[0-9]+$)","g");
			res=new RegExp("^[\+\-]?0\.[0-9]+$","g");
            break;
        case "l":
            res=new RegExp("^[a-z]+$","gi");
            break;
        case "ul":
            res=new RegExp("^[A-Z]+$","g");
            break;
        case "ll":
            res=new RegExp("^[a-z]+$","g");
            break;
        case "w":
            res=new RegExp("^[0-9a-zA-Z_]+$","g")
            break;
        case "S":
            res=new RegExp("[^a-zA-Z0-9\n\r\t\f\v~`!@#$%^&*()\_\+\\/\.,<>\? ]+$","g");
            break;
        case "e":
			res=new RegExp("([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+","g");
			break
		case "date":
			res=new RegExp("^[0-9]{4}\-(0?[1-9]|[1-2][0-2])\-(0?[1-9]|[1-2][0-9]|3[01])$","g");
			break;
		case "datetime":
			res=new RegExp("^[0-9]{4}\-(0?[1-9]|[1-2][0-2])\-(0?[1-9]|[1-2][0-9]|3[01]) [0-9]{2}(:[0-9]{2})+","g");
			break;
		case "ip":
			res=new RegExp("^([1-9]|[1-9][0-9]|[12][0-5][0-9])(\.([0-9]|[1-9][0-9]|[12][0-5][0-9])){3}$","g");
			break;
		case "money":
			res=new RegExp("^[0-9]+(\.[0-9]{2})?$","g");
			break;
		case "":
            res=new RegExp(".+","g");
			break;
		default:
			res=new RegExp(TypeValue,"g");
    }
    //Main Process
    IsOk=res.exec(Obj.value);
    if ((Necessary && !IsOk)||(!IsOk && Obj.value.length > 0 ))
        {
            alert(Msg);
			if (Obj.style.display == '')
			{
				Obj.focus();
				Obj.select();
			}
            return false;
        }
    else
        return true;

}
function XHConn()
{
	var xmlhttp, bComplete = false;
	try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");}
	catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
	catch (e) { try { xmlhttp = new XMLHttpRequest();  }
	catch (e) { xmlhttp = false; }}}
	if (!xmlhttp) return null;
	
	this.connect = function(sURL, sMethod, sVars, fnDone)
	{
		var retval	= "";
		if (!xmlhttp) return false;
		
		bComplete = false;
		sMethod = sMethod.toUpperCase();
		try {
			if (sMethod == "GET")
			{
				xmlhttp.open(sMethod, sURL+"?"+sVars, false);
				xmlhttp.send();
				retval = unescape(xmlhttp.responseText);
			}
			else
			{
				try{
					xmlhttp.open(sMethod, sURL, false);
					xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
					xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
					xmlhttp.send(sVars);
					retval = unescape(xmlhttp.responseText);
				}catch(e){
					
				}
			}
		}
		catch(z) {
			alert('发生错误！');	
			return false; 
		}

		return retval;
	};
	return "";
}

function checksearch(){
	if(document.getElementById('keyword').value == ''){
		alert('关键字不能为空！');
		document.getElementById('keyword').focus();
		return false;
	}
}