Determines whether the string emailAddr is in valid email format.

/** & Nbsp; * determine whether the string emailAddr is in a valid email format & nbsp; * mainly checks @ and. whether or not, and the location of the two fields & nbsp; * @ paramemailAddr input email address & nbsp; * @ returntrue/false. & Nbsp; */functionemailCheck (emailAddr) {& n /**
* Determine whether the string emailAddr is in valid email format
* Mainly judge whether @ and. appear, and the location of the two.
* @ Param emailAddr the input email address
* @ Return true/false.
*/

Function emailCheck (emailAddr)
{
If (emailAddr = null) | (emailAddr. length <2) return false;

// @ Is not the first character.
Var aPos = emailAddr. indexOf ("@", 1 );

If (aPos <0)
{
Return false;
}

// @ Appears after and does not follow.
If (emailAddr. indexOf (".", aPos + 2) <0)
{
Return false;
}

Return true;
}