function ValidateThis() {
var item = document.getElementById("ctl00_txtBulten");
var clienttext = item.value;
if(clienttext == "E-posta adresinizi giriniz.")window.cltxt= "";
else window.cltxt = clienttext;



//alert(clienttext);

var validated = false;



if(item.value == "E-posta adresinizi giriniz.")
{

validated = false;



}
else if (item.value == "E-posta adresi hatalı!")
{

validated = false;

}
else if (item.value.length < 5 )
{


validated = false;





}
else if (item.value.length > 30)
{

validated = false;

} 
else if (item.value== "" )
{

validated = false;

}
else if (IsEmail(item.value)== false)
{

validated = false;

}
else validated = true;



if(validated == false)
{

item.style.fontWeight = "bold"; 
item.style.color = "red"; 
item.value = "E-posta adresi hatalı!";
return false;

}
else return true;


   
    };
    function IsEmail(email) 
    {           
     var regex = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;      
           if (regex.test(email)) 
           return true;    
                   else 
                   return false;
};