if (emailadres =='') { alert(" E-mail adresinizi yazınız."); $("input[name='email']").focus(); $("input[name='email']").css("borderColor","#ff0000") $("input[name='email']").css("background","#fea9a9") $("input[name='email']").click(function(){ $(this).css("borderColor","#000") $(this).css("background","#fff") }) } function validateEmail($email) { var emailReg = /^([w-.]+@([w-]+.)+[w-]{2,4})?$/; return emailReg.test( $email ); } if( !validateEmail(emailadres)) { alert(" E-mail adresinizi yazınız."); $("input[name='email']").focus(); $("input[name='email']").css("borderColor","#ff0000") $("input[name='email']").css("background","#fea9a9") $("input[name='email']").click(function(){ $(this).css("borderColor","#000") $(this).css("background","#fff") }) }