function externalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
		anchor.target = "_blank";
	}
}

function validate_form(thisform) {
  with (thisform) {
		if (name.value == '' && phone.value != '') {
			alert('Please enter your name');
			name.focus();
			return false
		}
		if (phone.value == '' && name.value != '') {
			alert('Please enter a contact phone number');
			phone.focus();
			return false
		}
		if (name.value == '' && phone.value == '') {
			alert('Please enter your name and a contact phone number');
			name.focus();
			return false
		}
	}
}

function changeSrc(number) {
	document.getElementById("galleryImage").src="images/gallery"+number+".jpg";
	if (number == '01' || number == '04') {
		document.getElementById("galleryImageLink1").innerHTML="See step-by-step photos of this project";
	} else if (number == '02' || number == '05' || number == '07' || number == '08' || number == '09') {
		document.getElementById("galleryImageLink1").innerHTML="See additional photos of this project";
	} else {
		document.getElementById("galleryImageLink1").innerHTML="";
	}
	if (number != '03' && number != '06') {
		var numberOfPhotos = eval('gal'+number+'files').length;
		for (var i=numberOfPhotos+1;i!=10;i++) {
			document.getElementById(eval('\"galleryImageLink'+i+'\"')).rel="";
		}
		for (var j=1;j!=numberOfPhotos+1;j++) {
			document.getElementById(eval('\"galleryImageLink'+j+'\"')).href="images/"+eval('gal'+number+'files['+(j-1)+']');
			document.getElementById(eval('\"galleryImageLink'+j+'\"')).rel="lightbox[slideshow]";
		}
	}
}