正则表达式

  <script>
 //中英文混合验证   
/^[a-zA-Z\u4e00-\u9fa5]{1,20}$/.test("国")  

//邮箱验证
/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/.test("[email protected]");

// 匹配国类电话号码 
/\d{3}-\d{8}|\d{4}-\d{7}/.test("0711-73443035")

//身份证正则表达式(15位) 
isIDCard1=/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/; 

//身份证正则表达式(18位) 
isIDCard2=/^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$/; 

  // 有权威性的身份证验证 
	var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州" ,53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"} 

	function cidInfo(sId){ 
		var iSum=0 
		var info="" 
		if(!/^\d{17}(\d|x)$/i.test(sId))
			return false; 

		sId=sId.replace(/x$/i,"a"); 

		if(aCity[parseInt(sId.substr(0,2))]==null)
			return "Error:非法地区"; 

		sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); 
		var d=new Date(sBirthday.replace(/-/g,"/")) 

		if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))
			return "Error:非法生日"; 
		for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) 
			if(iSum%11!=1)
			return "Error:非法证号"; 
		return aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女") 
	} 
		
     // alert(  cidInfo("43250319920112769A")  );
	  alert(  cidInfo("4312211988a5265930")  );
  </SCRIPT>