$(document).ready(function(){
	$('input').keypress(function(){
		$(this).css({'background-position': '0px 0px'});
	});
});

function validate(){
	var contactFlag = 0;

	resetFields();
	
	if(document.contact_form.first_name.value == ''){
		$('form#contact_form input#first_name').css({'background-position': '0px -30px'});
		contactFlag = 1;
	}
	
	if(document.contact_form.last_name.value == ''){
		$('form#contact_form input#last_name').css({'background-position': '0px -30px'});
		contactFlag = 1;
	}
	
	if(document.contact_form.email.value == ''){
		$('form#contact_form input#email').css({'background-position': '0px -30px'});
		contactFlag = 1;
	} else {
		if(!checkEmail(document.contact_form.email.value)){
			document.contact_form.email.value = '';
			$('form#contact_form input#email').css({'background-position': '0px -30px'});
			contactFlag = 1;
		}
	}
	
	if(document.contact_form.company.value == ''){
		$('form#contact_form input#company').css({'background-position': '0px -30px'});
		contactFlag = 1;
	}
	
	if(document.contact_form.city.value == ''){
		$('form#contact_form input#city').css({'background-position': '0px -30px'});
		contactFlag = 1;
	}
	
	if(document.contact_form.state.value == ''){
		$('form#contact_form input#state').css({'background-position': '0px -30px'});
		contactFlag = 1;
	}
	
	if(contactFlag != 1){
		document.contact_form.submit();	
	}
}

function resetFields(){
	$('form input').css({'background-position': '0px 0px'});
}

function validate_key(key){
	if(key.keyCode == 13){
		validate();
	}
}

function checkEmail(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;				
}