Email validations

function ValidateForm()

{

var emailID=document.frmSample.txtEmail 

if ((emailID.value==null)||(emailID.value==""))

{ 

alert("Please Enter your Email ID") ;

emailID.focus();

return false ;

} 

if (echeck(emailID.value)==false)

{

emailID.value="" ;

emailID.focus() ;

return false ;

}

return true

}