function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);



function selectchange(obj1, searchType)
{
    var selectedval;
    
	for (var i = 0; i < obj1.length; i++)
	{
		if (obj1.options[i].selected)
		{
		    selectedval = obj1.options[i].value;
		}
	}
	
	if (selectedval != '-1' && selectedval!= '')
	{
	    selectedval = "stone_result.asp?searchId=" + selectedval + "&searchtype=" + searchType
	    location = 	selectedval;
	}
	
}


function doSearch()
{
    
    //first check colour    
    var selId = checkSelect(document.form1.colour);

    if ((selId!='-1') && (selId!= ''))
    {    
        location = 'stone_result.asp?searchId=' + selId + '&searchtype=colour';
        return false;
    }else 
    {
        selId = checkSelect(document.form1.material);
        if (selId!= '-1' && selId!= '' )
        {
	        location = "stone_result.asp?searchId=" + selId + "&searchtype=material";
	        return false;
	    }else
	    {	    
	        selId = checkSelect(document.form1.price);
            if (selId!= '-1' && selId!= '' )
            {
	            location = "stone_result.asp?searchId=" + selId + "&searchtype=price";
	            return false;
	        }
	    
	    }	    
    }
    
    alert('Please select a search type');
    return false;
}


function checkSelect(obj1)
{
    var selectedval
    selectedval = '-1';

    for (var i = 0; i < obj1.length; i++)
	{
		if (obj1.options[i].selected)
		{
		    selectedval = obj1.options[i].value;
		}
	}
    
    return selectedval;

}