function isemail( string ) { var pattern = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; return pattern.test( string ); } function one_checked( form, fname ) { var el, grp, e=0; while( el = form.elements[e++] ) { if( el.type=='checkbox' && el.name && el.name==fname ) { grp = form[el.name]; for( var i=0; i