function LTrim(str) 
{
	for (var i=0; str.charAt(i)==" "; i++);
	return str.substring(i,str.length);
	
}

function RTrim(str) 
{
	for (var i=str.length-1; str.charAt(i)==" "; i--);
	return str.substring(0,i+1);
}

function Trim(str) 
{
return LTrim(RTrim(str));
}

function checmail(s1)
{


if(s1.value=="")
  {
     alert("Please enter your email address")
	 s1.focus()
	return false;
	}
else
   {
	var atsign = s1.value.indexOf("@");
	  var dotsign = s1.value.indexOf(".",atsign);
	  var len = s1.value.length;
	var blank=s1.value.indexOf(" ")

if (len  < 1 || !(atsign>1 && atsign<len-1 && blank==-1 && dotsign>1 && dotsign<len-1 )) 
	{
    alert("Please enter a valid email address.");
	s1.focus();
return false;
  	}
	else
	{
		return true;
	}
   }
}

function press()
{
	if (event.keyCode>=48 && event.keyCode<=57)
	{
	}
	else
	{
	event.keyCode=0;
	}
}