function checkInvalidChar(oElem){
	if (oElem.value.indexOf(":") != -1 || oElem.value.indexOf("'") != -1 || oElem.value.indexOf("`") != -1 || oElem.value.indexOf("~") != -1 || oElem.value.indexOf("|") != -1 || oElem.value.indexOf(";") != -1){
		alert("You have entered an invalid character, please try again.");
		oElem.focus();
		return (false);
	}else{
		return (true);
	}
}

function checkEmail(oElem){
	if (oElem.value.indexOf("@",0) == -1 || oElem.value.indexOf(".",0) == -1){
		alert("Please enter a valid E-mail address ")
		oElem.focus();
		return (false);
	}
}