function changeMainImage()
{
	var img = document.getElementById("mainImage");
	var baseUrl = document.getElementById("baseUrl");
	var time = document.getElementById("time");
	var compidx = document.getElementById("compidx");
	var lf = document.getElementById("lf");
	
	img.src = baseUrl.value + "?symb=PFE&style=457&type=64&size=2";
	
	if(time.value != "null")
	{
		img.src += "&time=";
		img.src += time.value;
	}
	if(compidx.value != "null")
	{
		img.src += "&compidx=";
		img.src += compidx.value;
	}
	if(lf.value != "null")
	{
		img.src += "&lf=";
		img.src += lf.value;
	}
	img.src +="&size=1";
	return false;
}

function initSelectedItems()
{
	var time = document.getElementById("time");
	var lf = document.getElementById("lf");
	var compidx = document.getElementById("compidx");
	
	time.value = "1yr";
	lf.value = "1";
	compidx.value = "";
}