var baseURL="http://clients.weblink.com.au/clients/emecogroup/charts_img.asp?";

function updateChart() {
	var f = document.forms.chartdetails;
	var chartimg = document.getElementById("chartimgtag");
	var parameters = new Array();
	var e, URL;
	
	/* Load the list of parameters from the form */
	for (var i = 0; i < f.elements.length; i++) {
		var e = f.elements[i];
		if (e.disabled) continue;
		if (e.id == "") continue;
		if (e.value == "") continue;
		parameters.push(escape(e.id) + "=" + escape(e.value));
	}
	/* Load a new chart from these parameters */
	URL = baseURL + parameters.join('&');
	chartimg.src = URL;
}