/* JS for also-see image swap */

function alsoRollOver(objname)
{

	switch(objname)
	{
		case 'whydrugs':
		  document.getElementById('also-see').className = 'why-drugs'
  		break;    
		case 'brain':
 			document.getElementById('also-see').className = 'brain'
  		break;
		case 'doc':
 			document.getElementById('also-see').className = 'doc'

  		break;
		default:
			document.getElementById('also-see').className = ''
	}
	
}

function alsoRollOut(objname)
{
	document.getElementById('also-see').className = ''
	
}

/* JS for sliding DIVS */
var timerlen = 5;
var slideAniLen = 250;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function toggleSlide(objname){
  if(document.getElementById(objname).style.display == "none"){
    // div is hidden, so slide down
    slidedown(objname);
	// swap class of "open" and "close" button
	if(objname == 'drug-content-more')
	{
		document.getElementById('read-more').className ='read-less'
	}
	else if(objname == 'drug-risks-more')
	{
		document.getElementById('read-more-risks').className ='read-less'
	}
	else if(objname == 'drug-street-more')
	{
		document.getElementById('read-more-street').className ='read-less'
	}
  }
  
  else{
    // div is not hidden, so slide up
    slideup(objname);
	
	if(objname == 'drug-content-more')
	{
		document.getElementById('read-more').className =''
	}
	else if(objname == 'drug-risks-more')
	{
		document.getElementById('read-more-risks').className =''
	}
	else if(objname == 'drug-street-more')
	{
		document.getElementById('read-more-street').className =''
	}
  }
}

function slidedown(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display != "none")
                return; // cannot slide down something that is already visible

        moving[objname] = true;
        dir[objname] = "down";
        startslide(objname);
}

function slideup(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display == "none")
                return; // cannot slide up something that is already hidden

        moving[objname] = true;
        dir[objname] = "up";
        startslide(objname);
}

function startslide(objname){
        obj[objname] = document.getElementById(objname);

        endHeight[objname] = parseInt(obj[objname].style.height);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "1px";
        }

        obj[objname].style.display = "block";

        timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];

        if (elapsed > slideAniLen)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                if(dir[objname] == "up")
                        d = endHeight[objname] - d;

                obj[objname].style.height = d + "px";
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);

        if(dir[objname] == "up")
                obj[objname].style.display = "none";

        obj[objname].style.height = endHeight[objname] + "px";

        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}


/* arrows image swap */
function SimpleSwap(el,which){
  el.src=el.getAttribute(which || "origsrc");
}

function SimpleSwapSetup(){
  var x = document.getElementsByTagName("img");
  for (var i=0;i<x.length;i++){
    var oversrc = x[i].getAttribute("oversrc");
    if (!oversrc) continue;
      

    x[i].oversrc_img = new Image();
    x[i].oversrc_img.src=oversrc;
    x[i].onmouseover = new Function("SimpleSwap(this,'oversrc');");
    x[i].onmouseout = new Function("SimpleSwap(this);");
    x[i].setAttribute("origsrc",x[i].src);
  }
}

var PreSimpleSwapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreSimpleSwapOnload(); SimpleSwapSetup();}