functions.js

J2EE独立开发制作

<script language="JavaScript"> 

function CheckEmail(email)
{
    var firstchunk,indx,secondchunk

    if (email == ""){
        alert("Please make sure you have entered a valid " +
            "email before submitting the info.")

        return false
    }

    //get the zero-based index of the "@" character
    indx = email.indexOf("@")

    //if the string does not contain an @, then return false
    if (indx == -1 ){

        alert("Please make sure you have entered a valid " +
            "email before submitting the info.")

        return false
    }

    //if the first part of email is < two chars and thye second part is < seven chars
    //(arbitrary but workable criteria), reject the input address

    firstchunk = email.substr(0,indx) //up to but not including the "@"

    //start at char following the "@" and include up to end of email addr
    secondchunk = email.substr(indx + 1) 

    //if the part  following the "@" does not include a period "." then
    //also return false

    if ((firstchunk.length < 2 ) || (secondchunk.length < 7) ||
        (secondchunk.indexOf(".") == -1)){ 

        alert("Please make sure you have entered a valid " +
            "email before submitting the info.")

        return false
}

    //the email was okay; at least it had a @, more than one username chars,
    //more than six chars after the "@", and the substring after the "@"
    // contained a "." char

    return true

}//CheckEmail

function CreateWindow(uri) {

    var newWin =
        window.open(uri,'newwin1',
            'width=500,height=400,resizable,' +
            'scrollable,scrollbars=yes');
    newWin.focus( );

} 

</script>