/* Javascript functions */

var searchFormPhrase = 'Search for products...';

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function clearDefaultSearchForm(elem) { 
  if (elem.value == searchFormPhrase) {
  	elem.value='';
  }
}

function change(elem, color){
	elem.style.backgroundColor = color
}

function selectLoginAction(newAction)
{
	if (document.multiform) {
		document.multiform.action = newAction;
	
		if (document.multiform.doLogin) {
			document.multiform.doLogin.value = 0;
		}
	
		document.multiform.submit();
	}
}

function getXmlHttpObject()
{
	var xmlHttp=null;
	
	try
  	{
  		// Firefox, Opera 8.0+, Safari
  		xmlHttp=new XMLHttpRequest();
  	}
	catch (e)
  	{
  		// Internet Explorer
  		try
   	 	{
    		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    	}
  		catch (e)
    	{
    		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    	}
  	}	
  	
	return xmlHttp;
} 

function changeProductPicture()
{
	if (document.productForm) {
		var colorSelect = document.productForm.color;
		
		var style = document.productForm.style.value;
		var color = colorSelect.options[colorSelect.selectedIndex].value;
		var imgSrc = "/akimg/display.jpg?image=" + style + "_" + color + "_RG.jpg";
	
		if (document.images.productImage.src.indexOf(imgSrc) == -1) {
			var xmlHttp = getXmlHttpObject();

			if (xmlHttp == null) {
				document.images.productImage.src = imgSrc;
			}
			else {
				xmlHttp.onreadystatechange = function()
				{
					if(xmlHttp.readyState==4)
  					{
  						var response = xmlHttp.responseText;
  				
  						if (response.indexOf("FAIL") != -1) {
							var newUrl = window.location.href;
							newUrl = newUrl.replace(/color=[^&]+/i, "color=" + color);
				
							window.location.href = newUrl;
  						}
  						else {
  							document.images.productImage.src = imgSrc;
  						}
  					}
  				}
  					
  				var rnd = Math.random(); 
				xmlHttp.open("GET", "product_color_change?style=" + style + "&color=" + color + "&random=" + rnd, true);
  				xmlHttp.send(null);
  			}
  		}
	}
}

function changeCartItemPicture(imageId, style, colorSelect) {
	var image = document.getElementById(imageId);

	if (style && colorSelect && image) {
		var color = colorSelect.options[colorSelect.selectedIndex].value;
		var imgSrc = "/akimg/display.jpg?image=" + style + "_" + color + "_TN.jpg";
		
		if (image.src.indexOf(imgSrc) == -1) {
			image.src = imgSrc;
		}
	}
}

function changeLastCartItemPicture(imageId, style, colorSelect) {
	var image = document.getElementById(imageId);

	if (style && colorSelect && image) {
		var color = colorSelect.options[colorSelect.selectedIndex].value;
		var imgSrc = "/akimg/display.jpg?image=" + style + "_" + color + "_SM.jpg";
		
		if (image.src.indexOf(imgSrc) == -1) {
			image.src = imgSrc;
		}
	}
}

function activateLink(linkId, activeColor) {
	changeLink(linkId, activeColor, 'underline');
}

function pressLink(linkId, activeColor) {
	changeLink(linkId, activeColor, 'none');
}

function deactivateLink(linkId, deactiveColor) {
	changeLink(linkId, deactiveColor, 'underline');
}

function changeLink(linkId, color, textDecoration) {
	var link = document.getElementById(linkId);
	
	if (link && color && textDecoration) {
		link.style.color = color;
		link.style.textDecoration = textDecoration;
	}
}

function restoreFormsOnBackButton() {
	if (document.accountform) {
		document.accountform.reset();
	}
	
	if (document.productForm) {
		changeProductPicture();
	}
}