function checkEmail(aString){
	if (aString.substr(0,1)=="@") {
		return false;
	}
	if (aString.substr(aString.length-1,1)=="@"){
		return false;
	}
	flag=false;
	for (i=1;i<aString.length;i++){
		if (aString.substr(i,1)=="@"){
			flag= true;
		}
	}
	return(flag);
}
function checkForm(){

	if(!checkEmail(contact.email.value)) {
		alert("Invalid Email Address");
		return false;
	} else if(contact.message.value=="") {
		alert("Please input message");
		return false;
	} else	return true;

}