JavaScript User registration Information validation

User registration information is verified correctly

One, JavaScript way

Second, regular expression validation

Apply Regular expression validation: User name 4-16 bit, beginning of letter ; username 4-16 bit, first letter capitalized ; two times the password is the same; phone number One by one and starting with 1 ; date of birth

in the The register.jsp script section code is as follows

<script language= "JavaScript" type= "Text/javascript" >

function Check ()

{

var Name=document.getelementbyid ("name"). Value;

var patrn_name=/^[a-za-z][a-za-z0-9]{3,15}$/; User name 4-16 bit, beginning of letter

if (name!=null&&!patrn_name.exec (name))

{

Alert (" user name input does not meet the requirements " +name);

return false;

}

var Pass1=document.getelementbyid ("Pass1"). Value;

var patrn_pass=/^[a-z][a-za-z0-9]{3,15}$/; username 4-16 bit, first letter capitalized

if (Pass1!=null&&!patrn_pass.exec (PASS1))

{

Alert (" password input does not meet the requirements , first letter Capital " +pass1);

return false;

}

if (Form1.pass1.value!=form1.pass2.value)

{

Alert (" password is different ");

Form1.pass1.focus ();

return false;

}

var Tel=document.getelementbyid ("Tel"). Value;

var   patrn_tel=/^[1][0-9]{10}$/; tel:13562276780

if (tel!=null&&!patrn_tel.exec (tel))

{

Alert ("Tel does not meet the requirements ");

return false;

}

var Csrq=document.getelementbyid ("Csrq"). Value;

var patrn_csrq=/^ (19|20) \d{2}-(1[0-2]|0?[ 1-9])-(0?[ 1-9]| [1-2]   [0-9]|3[0-1]) $/; csrq:2012-02-05

if (Csrq!=null&&!patrn_csrq.exec (CSRQ))

{

Alert ("csrq:2012-02-05");

return false;

}

return true;

}

</script>

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JavaScript User registration Information validation