/* use safari css if needed */
if (navigator.userAgent.indexOf('AppleWebKit/') > -1) {
	document.write("<link href='css/safari.css' rel='stylesheet' type='text/css' />");
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
MM_preloadImages('images/add_to_cart_ro.jpg','images/add_to_cart_ro.jpg');

function clearText(id, text) {
	if (document.getElementById(id).value == text) {
		document.getElementById(id).value		= '';
		document.getElementById(id).style.color	= '#000';
	}
}
function resetText(id, text) {
	if (document.getElementById(id).value == "") {
		document.getElementById(id).value		= text;
		document.getElementById(id).style.color	= '#666';
	}
}

<!-- AJAX using Prototype.js -->
function sendContact() {
	first_name	 = document.getElementById('first_name').value;
	last_name	 = document.getElementById('last_name').value;
	email		 = document.getElementById('email').value;
	message		 = document.getElementById('message').value;

	// check required fields
	if (first_name == '' || last_name == '' || email == '')
		alert('Oops! Please fill in required fields.');
	else {
		// show loading bar
		document.getElementById('status_send').innerHTML = 'Sending...<br/><img src="images/load_bar1.gif">';
		new Ajax.Request('ajax/send_contact.php', {
			method:'get',
			parameters: {first_name: first_name, last_name: last_name, email: email, message: message},
			onSuccess: function(transport){
				var response = transport.responseText;
				switch (response) {
					case('sent'): document.getElementById('status_send').innerHTML = "<span style='color:#009900'>Message sent.<br/>Thank you!</span>"; break;
					default: document.getElementById('status_send').innerHTML = "<span style='color:#ff0000'>Message did not send,<br/>please try again.</span>";
				}
			},
			onFailure: function(){ alert('Message did not send, please try again.') }
		});
	}
}