function trim(stringToTrim) 
{
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}
function emailcheck(str)
{
	emailF = false;
	if(str!="")
		{
			var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
			var ans = str.match(emailExp);
			if(ans == str)
			{
				emailF = true;
			}
		}	
	return emailF;
}
function check()
{
	if(trim(document.getElementById("custname").value) == "")
	{
		alert('Please Enter Name.');
		document.getElementById("custname").focus();
		return false;
	}
	if(trim(document.getElementById("custemail").value) == "")
	{
		alert('Please Enter Email.');
		document.getElementById("custemail").focus();
		return false;
	}
	if(!emailcheck(document.getElementById("custemail").value))
	{
		alert('Please Enter Valid Email.');
		document.getElementById("custemail").focus();
		return false;
	}
	if(trim(document.getElementById("comments").value) == '')
	{
		alert('Please Enter Comments.');
		document.getElementById("comments").focus();
		return false;
	}
}
function reset_all()
{
  document.getElementById("custname").value = "";
  document.getElementById("custemail").value = "";
  document.getElementById("comments").value = "";
  document.getElementById("custname").focus();
  return false;
}