function check()
{	
	if ((Trim(document.all.sn.value)=="M3IPVC1892160")||(Trim(document.all.sn.value)=="14556848811"))
	{
	window.location.href="https://sshop.element5.com/esales/checkout.html?productid=300132942&language=English";
	}
	else
	{
	window.location.href="sn_wrong.htm";
	}  
}

function Trim(InString) {

   strLen = InString.length;
   if(strLen==0) 
        OutString = InString;
   else {
       i=0;
       while ( InString.charAt(i) == " ") {
          i++;
       }
       j=strLen-1;
       while ( InString.charAt(j) == " ") {
          j--;
       }
       if(strLen==i)
        OutString = "";
       else
        OutString = InString.substring(i,j+1);
   }
   return OutString;
}