function drop(inID) {
	clearDrops();
	document.getElementById("ddblockframe").style.display = 'block';
	document.getElementById("ddblockframe2").style.display = 'block';
	document.getElementById(inID).style.display = 'block';
}

function clearDrops() {
	document.getElementById("dd_au").style.display = 'none';
	document.getElementById("dd_c").style.display = 'none';
	document.getElementById("dd_cl").style.display = 'none';
	document.getElementById("ddblockframe").style.display = 'none';
	document.getElementById("ddblockframe2").style.display = 'none';
}

function checkContactForm(theForm) {
    var why = "";
    why += checkName(theForm.Name.value);
    why += checkEmail(theForm.Email.value);
    why += checkComments(theForm.Comments.value);
    if (why != "") {
       alert(why);
       return false;
    }
return true;
}

// check name

function checkName (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a name.\n";
    }    
return error;
}

// check e-mail address

function checkEmail (strng) {
var error="";
if (strng == "") {
   error = "You didn't enter an email address.\n";
}

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       error = "Please enter a valid email address.\n";
    }
    else {

//test email for illegal characters
       
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
         if (strng.match(illegalChars)) {
          error = "The email address contains illegal characters.\n";
       }
    }
return error;    
}

// check for comments

function checkComments (strng) {
var error = "";
if (strng == "") {
    error = "You didn't enter any requests, questions or comments.\n";
    }    
return error;
}

function sender() {
	if (checkContactForm(document.contact)) {
		document.contact.submit();
	}
}

// show and hide toggle

function toggle5(showHideDiv, switchImgTag) {
        var ele = document.getElementById(showHideDiv);
        var imageEle = document.getElementById(switchImgTag);
        if(ele.style.display == "block") {
                ele.style.display = "none";
		imageEle.innerHTML = '<img src="../images/toggle_off.gif">';
        }
        else {
                ele.style.display = "block";
                imageEle.innerHTML = '<img src="../images/toggle_on.gif">';
        }
}