function chk(){ var a, b, c, e; a = d("name"); b = d("phone"); c = d("email"); e = d("question"); if(a.value == "" || a.value == "Name"){alert('please enter your name'); return false;} if(b.value == "" || b.value == "Phone"){alert('please enter your phone no'); return false;} if(c.value == "" || c.value == "Email" || c.value <=0 || (c.value.indexOf("@",0) == -1 || c.value.indexOf(".",0) == -1)){alert('please enter your email address'); return false;} if(e.value == "" || e.value == "Question"){alert('please enter your comments'); return false;} else { return true; }} function d(c){return document.getElementById(c);}