var reg1=/^[a-zA-Z0-9]{3,10}$/, reg2=/^.{6,20}$/, username=document.getElementById('username').value; password=document.getElementById('password').value; password2=document.getElementById('password-2').value; if(!reg1.test(username)){ alert('用户名必须是3-10位英文字母或数字'); return false; } if(!reg2.test(password)){ alert('口令必须是6-20位'); return false; } if(password!==password2){ alert('两次输入口令必须一致'); return false; } return true;}
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我是--只小小鸟
var reg1=/^[a-zA-Z0-9]{3,10}$/, reg2=/^.{6,20}$/, username=document.getElementById('username').value; password=document.getElementById('password').value; password2=document.getElementById('password-2').value; if(!reg1.test(username)){ alert('用户名必须是3-10位英文字母或数字'); return false; } if(!reg2.test(password)){ alert('口令必须是6-20位'); return false; } if(password!==password2){ alert('两次输入口令必须一致'); return false; } return true;
}