function createAutoIframe(Turl,frame_name,frame_width,frame_hight,frame_object) {
    if (frame_object.name) {
		destroyIFrameObj = document.body.removeChild(frame_object);
		eval(frame_name+'frm=document.createElement(\'iframe\')');
		tempIFrame = eval(frame_name+'frm');
		tempIFrame.setAttribute('name',frame_name);
		tempIFrame.style.border='0px';
		tempIFrame.style.width=frame_width;
		tempIFrame.style.height=frame_hight;
		tempIFrame.src=Turl;
		IFrameObj = document.body.appendChild(tempIFrame);
	} else {
		eval(frame_name+'frm=document.createElement(\'iframe\')');
		tempIFrame = eval(frame_name+'frm');
		tempIFrame.setAttribute('name',frame_name);
		tempIFrame.style.border='0px';
		tempIFrame.style.width=frame_width;
		tempIFrame.style.height=frame_hight;
		tempIFrame.src=Turl;
		IFrameObj = document.body.appendChild(tempIFrame);
	}
	return IFrameObj;
}
function removeAutoIFrame(frame_object) {
	document.body.removeChild(frame_object);
	iframe = 0;
}			

var iframe = '';			
function subscribe() {
	if (document.subscribe_form.email.value == '') {
		alert('You must fill in your Email');
		return false;
	}
	if (document.subscribe_form.first_name.value == '') {
		alert('You must fill in your first name');
		return false;
	}
	iframe = createAutoIframe('/includes/add_subscribe.php?email='+document.subscribe_form.email.value+'&first_name='+document.subscribe_form.first_name.value,'subscribe',0,0,iframe);
}