function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}

function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}


/**
 * Return the sample id of the specified url or null if the specified url doesn't 
 * refer a sample
 */ 
function getSampleId(aURL)
{
	 sample_dir_index=aURL.indexOf('data/samples/');
	 if (sample_dir_index!=-1)
	 {
  	 sample_href=aURL.substring(sample_dir_index+13);
  	 ext_index=sample_href.indexOf(".oml");
  	 if ((ext_index!=-1)&(sample_href.indexOf("proxy.php")==-1))
  	 {
  	   sample_id=sample_href.substring(0,ext_index);
  	   return sample_id;
  	 }
   }
   return null;
}

function rewriteURLs(anIframe,aProxyPrefix) 
{
	var doc = (anIframe.contentWindow || anIframe.contentDocument);
  if (doc.document) doc = doc.document;
	for (i=0;i<doc.images.length;i++)
	{
		doc.images[i].src=aProxyPrefix+escape(doc.images[i].src);
	}
	base_url=document.location.href.replace(/%3A/g,":");
	base_uri=base_url.substring(0,base_url.lastIndexOf(':'));
	for (i=0;i<doc.links.length;i++)
	{
	 sample_id=getSampleId(doc.links[i].href);
	 if (sample_id!=null)
	 {
  	   doc.links[i].href="javascript:window.parent.location.href='"+base_uri+':'+sample_id+"'";
   }
	}
	base_sample_ns=base_uri.substring(base_uri.indexOf("id=")+3);
	for (i=0;i<doc.forms.length;i++)
	{
	 sample_id=getSampleId(doc.forms[i].action);
	 if (sample_id!=null)
	 {
	    doc.forms[i].target="_parent";
      var h=document.createElement('input');
      h.setAttribute('type','hidden');
      h.setAttribute('name','id');
      h.setAttribute('value',base_sample_ns+':'+sample_id);
      doc.forms[i].appendChild(h);	     
	    doc.forms[i].action=base_uri.substring(0,base_uri.indexOf("?"));
   }
	}
}



function onDeviceProfileSelectChange(aSampleId,aSelect)
{
	changeDeviceProfile(aSampleId,aSelect.options[aSelect.selectedIndex].value,aSelect.options[aSelect.selectedIndex].getAttribute('devicewidth'));
}

function changeDeviceProfile(aSampleId,aProfileId,aWidth)
{
  setCookie("dp",aProfileId);
	iframe=document.getElementById(aSampleId+'iframe');
	iframe.width=aWidth;
	iframe.src=iframe.src.replace(/profile=.*&/,'profile='+aProfileId+'&');
}

function onLookAndFeelSelectChange(aSampleId,aSelect)
{
	changeLookAndFeel(aSampleId,aSelect.options[aSelect.selectedIndex].id,unescape(aSelect.options[aSelect.selectedIndex].value));
  setCookie("lf",aSelect.options[aSelect.selectedIndex].getAttribute('lfid'));
}

function changeLookAndFeel(aSampleId,aBaseURI,aLookAndFeelParam)
{
	iframe=document.getElementById(aSampleId+'iframe');
	iframe.src=iframe.src.replace(/url\=.*/,'url='+aBaseURI);
	iframe.src=iframe.src.replace(/%3F.*/,'%3F'+escape(aLookAndFeelParam));
}