function check_mail(email)
{	
	var re3 = /^\s*([a-zA-Z0-9\._\-]{1,100})@([a-zA-Z0-9\.\-_]){1,100}\.([a-zA-Z]{2,4})\s*$/gi;
     
    if (email.value.length>=0 && !email.value.match(re3)) 
	{
		alert("Please enter a valid email address");
		return false;
	}
	
	return true;
}

function counter(field, count, max) 
{
	if (field.value.length > max) {
		field.value = field.value.substring(0, max);
	}
	else {
		obj = document.getElementById(count);
        obj.childNodes[0].data = max - field.value.length;
	}
}

function update_price(price)
{
	tag_len = document.form.tag.value.length;

	tag_size = document.form.tag_size.value;
	switch(tag_size) 
	{
		case '12px':add_size = 0;break;
		case '15px':add_size = 1;break;
		case '20px':add_size = 2;break;
		case '25px':add_size = 4;break;
		case '30px':add_size = 8;break;
		case '35px':add_size = 16;break;
	}

	tag_color = document.form.tag_color.value;
	switch(tag_color) 
	{
		case '#000000':add_color = 0;break;
		case '#FFFFFF':add_color = 0;break;
		case '#C2D220':add_color = 2;break;
		case '#D65421':add_color = 2;break;
		case '#D5B920':add_color = 2;break;
		case '#20A0CF':add_color = 3;break;
		case '#DF2278':add_color = 3;break;
	}

	tag_back = document.form.tag_back.value;
	switch(tag_back) 
	{
		case '#FFFFFF':add_back = 0;break;
		case '#000000':add_back = 3;break;
		case '#C2D220':add_back = 3;break;
		case '#D65421':add_back = 3;break;
		case '#D5B920':add_back = 3;break;
		case '#20A0CF':add_back = 4;break;
		case '#DF2278':add_back = 4;break;
	}

	p = document.getElementById('total_price');
	p.childNodes[0].data = tag_len*(price + add_size+add_color+add_back);
	
	document.getElementById('price').value=tag_len*(price + add_size+add_color+add_back);
}

function update_tag_size(price)
{
	charSize = document.form.tag_size.value;
	document.getElementById('sample_tag').style.fontSize = charSize;
	update_price(price);
}

function update_tag_color(price)
{
	charColor = document.form.tag_color.value;
	document.getElementById('sample_tag').style.color = charColor;
	update_price(price);
}

function update_tag_back(price)
{
	backColor = document.form.tag_back.value;
	document.getElementById('sample_tag').style.backgroundColor = backColor;
	update_price(price);
}