n") return false; } if(m3.indexOf("@",ShtrudelPos3+1)!=-1) { alert("your third friend's email is not valid. Please try again") return false; } //a dot after the shtrudel dotpos3= m3.indexOf(".",ShtrudelPos3) if(dotpos3==-1) { alert("your third friend's email is not valid. Please try again") return false; } } document.frmrefer.submit() }