// JavaScript Document
function showHideDiv(divId)
{
	if( document.getElementById(divId).style.visibility == "visible" ){
		document.getElementById(divId).style.visibility = "hidden";
		document.getElementById(divId).style.height = "0px";
		document.getElementById(divId).style.overflow = "hidden";
	}
	else{
		document.getElementById(divId).style.visibility = "visible";
		document.getElementById(divId).style.height = "auto";
	}
}

function expandDiv(divId,divLen)
{	
	if(document.getElementById(divId).offsetHeight < divLen){
		document.getElementById(divId).style.height = divLen +"px";
	}
}

function preLoadImage(image_src)
{
	if (document.images)
	{
		image = new Image();
		image.src = image_src;
	}
}

function changeMainImage(new_thumbsrc,new_imagesrc)
{
	if (document.images)
	{
		document.getElementById("thumb_src").src = new_thumbsrc;
		document.getElementById("image_src").href = new_imagesrc;
	}
}

function displayAlert(text)
{
	if ( !document.getElementById("terms").checked )
	{
		alert(text);
		return false;
	}
}