function openBrWindow(theURL,winName,features, myWidth, myHeight, isCenter) { //v3.0

  if(window.screen)if(isCenter)if(isCenter=="true"){

    var myLeft = (screen.width-myWidth)/2;

    var myTop = (screen.height-myHeight)/2;

    features+=(features!='')?',':'';

    features+=',left='+myLeft+',top='+myTop;

  }

  window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);

}


function validate_bulten()
{

if(eb.ad.value.length < 3) {
				{alert('Adınızı ve soyadınızı yazın!');}
				return false;
}

apos=eb.email.value.indexOf("@");
dotpos=eb.email.value.lastIndexOf(".");
if (apos<1||dotpos-apos<2) 
  {alert('Geçerli bir e-posta adresi yazın!');return false;}
else {return true;}

}