// email address validation
function emailCheck(str) {

	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if (str.indexOf(at)==-1){
	   return false
	}
	
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   return false
	}
	
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	}
	
	 if (str.indexOf(at,(lat+1))!=-1){
		return false
	 }
	
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	 }
	
	 if (str.indexOf(dot,(lat+2))==-1){
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		return false
	 }
	
	 return true					
}


// validate and submit form

function submitForm(form){
	
	//for each form element that has a class 'validate'
	
	var form = e(form);
	
	for (var n=0; n < form.elements.length; n++) {
		
		if((form.elements[n].type == "text") && (form.elements[n].className.match("validate"))){
			
			var field = form.elements[n];
	
			if ((field.value == null) || (field.value == "")){
				field.style.backgroundColor = '#f3aac6';
				field.focus();
				return false;
			}
			
			//check for valid email address
			if(form.elements[n].name == "email"){
			
				if (emailCheck(field.value) == false){
					new Effect.Highlight(field, {startcolor:'#f3aac6', endcolor:'#eeeeee'})
					field.value="email address must be valid"
					field.focus()
					return false
				}
				
			}
			
		}
	}
		
	var params = "";
	
	//for each form element that is either a text, radio or textarea field add element name and value to params variable
	for (var n=0; n < form.elements.length; n++) {
		if(form.elements[n].type == "text"){
			params = params + form.elements[n].name + "=" + form.elements[n].value + "&";
		}else if(form.elements[n].type == "radio" && form.elements[n].checked){
			params = params + form.elements[n].name + "=" + form.elements[n].value + "&";
		}else if(form.elements[n].name == "comments"){
			params = params + form.elements[n].name + "=" + form.elements[n].value + "&";
		}
	}
	
	xmlHttp=getXmlHttpObject();
	
	var url="contact_send.php?"+params;
	
	xmlHttp.open("GET",url,true);
	
	xmlHttp.onreadystatechange=displayResults;

	xmlHttp.send(null);
}