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];}
}

/* form submissions */

function check_contribution() {
	var frm = document.contribute;
	var errors = "Please check the following errors:\n\n";
	var flag = false;
	
	if( frm.full_name.value == "" ) {
		errors += "- Your name is required\n";
		flag = true;
	}
	if( frm.occupation.value == "" ) {
		errors += "- Your occupation is required\n";
		flag = true;
	}
	if( frm.address.value == "" ) {
		errors += "- Your address is required\n";
		flag = true;
	}
	if( frm.amount.value == "" ) {
		errors += "- Your contribution amount is required\n";
		flag = true;
	}
	if( frm.email.value == "" ) {
		errors += "- Your email is required\n";
		flag = true;
	}
	else {
		emailValidator(frm.email.value);
	}
	
	if( frm.authorize.checked == false ) {
		errors += "- You must check the contribution acknowledgment statement\n";
		flag = true;
	}
	
	if( flag ) {
		alert(errors);
		return false;
	}
	else {
		frm.submit();	
	}
}

function check_share() {
	var frm = document.share;
	var errors = "Please check the following errors:\n\n";
	var flag = false;
	
	if( frm.full_name.value == "" ) {
		errors += "- Your name is required\n";
		flag = true;
	}
	if( frm.email.value == "" ) {
		errors += "- Your email is required\n";
		flag = true;
	}
	else {
		emailValidator(frm.email.value);
	}
	if( frm.message.value == "" ) {
		errors += "- Your thought message is required\n";
		flag = true;
	}
	
	if( flag ) {
		alert(errors);
		return false;
	}
	else {
		frm.submit();	
	}
}




function emailValidator(data) {
	var flag = false;
	var message = "The format of this email address is invalid.\n\n";
	message += "Please use a fully qualified email address.\n\n";
	message += "example: jblack@company.com";

	var user, ending, suffix, j;
	
	//Checks format of email address
	if( data.indexOf("@") > 0  ) {
		parts1 = data.split("@");
		user = parts1[0];
		ending = parts1[1];
			
		if( ending.indexOf(".") > 0 ) {
			parts2 = ending.split(".");
			j = parts2.length - 1;
			suffix = parts2[j];
				
			//Suffix can only be 2 or 3 characters long		
			if( suffix.length > 1 && suffix.length < 4  ) {
				for(var k=0; k<j; k++) {
					//Domains must be at least 2 characters long
					if( parts2[k].length < 2 ) {
						flag = true;
					}
				}
			}
			else {
				flag = true;
			}
		}
		else {
			flag = true;
		}
	}
	else {
		flag = true;
	}

	if(flag) {
		alert(message);
		return false;
	}
	else {
		return true;
	}
}


function changeGalleryPhoto(img) {
	
	var img_src = "http://www.electdaveshoemaker.com/images/photos/photo" + (img+1) + ".jpg";
	
	document.getElementById('photo_viewer').src = img_src;
	for( var i=0; i<5; i++ )
		document.getElementById("thumb"+i).className = "timage";
	document.getElementById("thumb"+img).className = "timage_on";
	document.getElementById("photo_caption").innerHTML = document.getElementById("thumb"+img).alt;
}