function checkemail(){
	if(document.ContactForm.ContactVia.options[document.ContactForm.ContactVia.selectedIndex].value =='Email'){
		if(Trim(document.ContactForm.user_email.value)==""){
			alert("Please provide an email to be contacted on.");
			document.ContactForm.user_email.focus();
			return false;
		}		
		else{
			if(validate_email('ContactForm','user_email','Please provide a valid email address.\nFormat: user@yourdomain.gov.au')){
			return false;	
			}
		}
	}
}
function validate_email(DocName, DocVal, Desc){
	if (Trim(document.forms[DocName].elements[DocVal].value) != ""){
		var field = document.forms[DocName].elements[DocVal];  
		var str = field.value;
		var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
		var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/;
		if (reg1.test(str) || !reg2.test(str)){
			document.forms[DocName].elements[DocVal].focus();
			alert(Desc);
			return true;
		}
	}	
	else{
	    return false;
	}	
}
function LTrim(str){
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(0)) != -1){
		var j=0, i = s.length;
		while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
		j++;
		s = s.substring(j, i);
	}
	return s;
}

function RTrim(str)
{
	var whitespace = new String(" \t\n\r");
	var s = new String(str);
	if (whitespace.indexOf(s.charAt(s.length-1)) != -1){  
	    var i = s.length - 1;  
	    while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
	        i--;
	    s = s.substring(0, i+1);
	}
	return s;
}

function Trim(str)
{
	return RTrim(LTrim(str));
}