//去左右空格
function trim(s){
 	return rtrim(ltrim(s)); 
}
//去左空格
function ltrim(s){
 	return s.replace( /^\s*/, ""); 
}
//去右空格 
function rtrim(s){ 
 	return s.replace( /\s*$/, ""); 
}
//验证信息
//是否空字符串
function isEmpty(s){
	s = trim(s); 
	return s.length == 0; 
}
//Email;
function isEmail(s){
	s = trim(s); 
 	var p = /^[_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.){1,4}[a-z]{2,3}$/i; 
 	return p.test(s);
}
//是否数字
function isNumber(s){
	return !isNaN(s); 
}
//颜色值
function isColor(s){ 
	s = trim(s); 
	if (s.length !=7) return false; 
	return s.search(/\#[a-fA-F0-9]{6}/) != -1; 
}

//去掉字符串首尾空格  
String.prototype.Trim = function() {  
  var m = this.match(/^\s*(\S+(\s+\S+)*)\s*$/);  
  return (m == null) ? "" : m[1];  
}  
//验证合法手机号  
String.prototype.isMobile = function() {  
  return (/^(?:13\d|15[89])-?\d{5}(\d{3}|\*{3})$/.test(this.Trim()));  
} 

//身份证
function isCard(s){ 
	s = trim(s); 
	var p = /^\d{15}(\d{2}[xX0-9])?$/; 
	return p.test(s);
}
//URL;
function isURL(s){
	s = trim(s).toLowerCase();
	var p = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;
	return p.test(s);
}
//Phone;
function isPhone(s){
	s = trim(s);
	var p = /^((\(\d{3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}$/;
	return p.test(s);
}
//Zip;
function isZip(s){
	s = trim(s);
	var p = /^[1-9]\d{5}$/;
	return p.test(s);
}
//Double;
function isDouble(s){
	s = trim(s);
	var p = /^[-\+]?\d+(\.\d+)?$/;
	return p.test(s);
}
//Integer;
function isInteger(s){
	s = trim(s);
	var p = /^[-\+]?\d+$/;
	return p.test(s);
}
//English;
function isEnglish(s){
	s = trim(s);
	var p = /^[A-Za-z]+$/;
	return p.test(s);
}
//中文
function isChinese(s){
	s = trim(s);
	var p = /^[\u0391-\uFFE5]+$/;
	return p.test(s);
}
//双字节
function isDoubleChar(s){
	var p = /^[^\x00-\xff]+$/;
	return p.test(s);
}
//含中文字符
function hasChineseChar(s){
	var p = /[^\x00-\xff]/;
	return p.test(s);
}
//
function hasAccountChar(s){
	var p = /^[a-zA-Z0-9][a-zA-Z0-9_-]{0,15}$/;
	return p.test(s);
}
function limitLen(s,Min,Max){
	s=trim(s);
	if(s=="") return false;
	if((s.length<Min)||(s.length>Max))
		return false;
	else
		return true;
}