var rules = new Array();

var sizes = new Array("20 inch","22 inch","24 inch","26 inch","28 inch","30 inch (To Order)");
var colours = new Array("Blue graded","Pink graded");

function checkRules(loading){
	
	if(loading == null)
		loading = false;
	
	//assume valid until we find otherwise
	$('addToBasket').disabled = false;
	
	var i;
	//go through all the rules
	for(i=0; i<rules.length; i++){
		//go through the sizes to get the index of the of the from size and the to size
		for(j=0; j<sizes.length; j++){
			if(sizes[j] == rules[i].from)
				fromIndex = j;
			if(sizes[j] == rules[i].to)
				toIndex = j;
		}
		
		$('rule'+i).className='ruleNormal';

		selectedIndex = $('product_size').selectedIndex;

		if(selectedIndex>=fromIndex && selectedIndex<=toIndex){
			if(rules[i].type=="ONLY"){
				if($('product_colour').value == rules[i].colour){
				//	$('rule'+i).className='ruleNormal';
				} else {
					if(!loading){
					//	$('rule'+i).className='ruleHighlight';
						if(rules[i].from!=rules[i].to)
							alert("Sizes "+rules[i].from+" to "+rules[i].to+" are ONLY available in "+rules[i].colour);
						else
							alert("Size "+rules[i].from+" is ONLY available in "+rules[i].colour);
					}
					$('product_colour').value = rules[i].colour;
				}
			} else if(rules[i].type=="NOT"){
				if($('product_colour').value == rules[i].colour){
					if(!loading){
						$('rule'+i).className='ruleHighlight';
						if(rules[i].from!=rules[i].to)
							alert("Sizes "+rules[i].from+" to "+rules[i].to+" are NOT available in "+rules[i].colour);
						else
							alert("Size "+rules[i].from+" is NOT available in "+rules[i].colour);
						$('addToBasket').disabled = true;
					}
				}
			}
		}
	} 
}

function rulesToEnglish(){
	var words = "";
	var i;
	for(i=0; i<rules.length; i++){
		if(rules[i].from!=rules[i].to)
			words += "<div id='rule"+i+"' class='ruleNormal'>Sizes "+rules[i].from+" to "+rules[i].to+" are "+rules[i].type+" available in "+rules[i].colour+"</div>";
		else
			words += "<div id='rule"+i+"' class='ruleNormal'>Size "+rules[i].from+" is "+rules[i].type+" available in "+rules[i].colour+"</div>";
	}
	if(words != "")
		$('rules').style.height = "auto";
	
	$('rules').innerHTML = words;
	checkRules(true);
}