function theForm_onsubmit(){

//校验登录名：只能输入5-20个以字母开头、可带数字、“_”的字串

	var username = form2.username.value
    var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[_]){4,19}$/;	
	
    if(!patrn.exec(username)){
		form2.username.style.background="#FDF2C1"
	    form2.username.focus();
		alert("用户名只能为：字母开头，可带数字，“_”，5-20个的字符组成!");
		return false;
	}



//校验密码：只能输入6-20个字母、数字、下划线

	var password = form2.password.value
	var patrn_psw=/^(\w){6,20}$/;	

    if(!patrn_psw.exec(password)){
		form2.password.style.background="#FDF2C1"
	    form2.password.focus();
		alert("密码只能为：6-20个字母、数字、下划线!");
		return false;
	}
	
	
//判断两次密码输入是否一致！	
	
	if(form2.password.value!=form2.password2.value){
		 alert("两次密码输入不一致！");
		 form2.password2.style.background="#FDF2C1"
		 form2.password2.focus();
		 return false;
	}
	


// 验证邮箱

		var email = form2.email.value
		var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;
		if(!pattern.test(email)){
		form2.email.style.background="#FDF2C1"
		form2.email.focus();		
		alert("邮箱地址的格式不正确！");
		return false;
	  }
	  
	  
// 阅读协议
	
	if(form2.check_box.checked==false){
		form2.check_box.style.background="#FDF2C1"	
		 form2.check_box.focus();	
		 alert("请阅读《中华人才在线企业会员注册协议》！");
		
		 return false;
		}

}

function check_username(){
	var username = form1.username.value
    var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[_]){4,19}$/;	
	
    if(!patrn.exec(username)){
		form1.username.style.background="#FDF2C1"
		form2.username.value==username
	    form1.username.focus();
		alert("用户名只能为：字母开头，可带数字，“_”，5-20个的字符组成!");
		return false;
	}
}


function get_password(){

//校验登录名：只能输入5-20个以字母开头、可带数字、“_”的字串

	var username = form2.username.value
    var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[_]){4,19}$/;	
	
    if(!patrn.exec(username)){
		form2.username.style.background="#FDF2C1"
	    form2.username.focus();
		alert("用户名只能为：字母开头，可带数字，“_”，5-20个的字符组成!");
		return false;
	}


// 验证邮箱

		var email = form2.email.value
		var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;
		
		if(!pattern.test(email)){
		form2.email.style.background="#FDF2C1"
		form2.email.focus();		
		alert("邮箱地址的格式不正确！");
		return false;
	  }
	  

}
// JavaScript Document