function trim(inputString) {
   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") {
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") {
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) {
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
   }
   return retValue;
}

function checkemail(emailadd)
{
	var result = false;
  	var theStr = new String(emailadd);
  	var index = theStr.indexOf("@");
  	if (index > 0)
  	{
    	var pindex = theStr.indexOf(".",index);
    	if ((pindex > index+1) && (theStr.length > pindex+2))
		result = true;
  	}
  		
  	return result;
}

function doLogout()
{
 if(confirm('Are you sure you want to logout?'))
 window.navigate('logout.php');
} 


function validateForm()
{
	var docF=document.subscribe;

  if(docF.address.value=="")
	 {
		alert("Please enter your Email address!");
		docF.address.focus();
		return false;
	 }
	 
	 
  if(!checkemail(docF.address.value))
	 {
		alert("Please correct your Email address!");
		docF.address.focus();
		return false;
	 }	 
}