function redirectToSymptom(){
	ddl = document.getElementById("symptom-navigation");
	if(ddl && ddl.selectedIndex != 0){
		window.location.href = ddl.options[ddl.selectedIndex].value;
	}
}

function showPanel(targetId){
	target = document.getElementById(targetId);
	if(target){
		// first hide all
		els = getElementsByClass("factsContent");
		for(i=0;i<els.length;i++){
			els[i].style.display = "none";
		}
		
		// then show targeted div
		target.style.display = "block";
	}
}


function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if (node == null)
		node = document;
	if (tag == null){
		tag = '*';
	}
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}