function validatesend()
{

uremail=document.getElementById('uremail').value;
friemail=document.getElementById('friendmail').value;
uremDOT=document.getElementById("uremail").value.indexOf(".");
uremAT=document.getElementById("uremail").value.indexOf("@");
friemDOT=document.getElementById("friendmail").value.indexOf(".");
friemAT=document.getElementById("friendmail").value.indexOf("@");


submitOK="true";

if(uremail=="" || uremail==null)
{
alert("Please fill your own email address!!!");
submitOK="false";
return false;
}

else if(uremAT==0 || uremAT==-1 || uremDOT==-1 || uremDOT==0)
{
alert("Please check your own e-mail address!!!");
submitOK="false";
return false;
}

else if(friemail=="" || friemail==null)
{
alert("Please fill your friend's email address!!!");
submitOK="false";
return false;
}

else if(friemAT==0 || friemAT==-1 || friemDOT==-1 || friemDOT==0)
{
alert("Please check your friend's e-mail address!!!");
submitOK="false";
return false;
}

}