startList = function() {
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("nav");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}
	}
}
window.onload=startList;

function changeInputTextColor(inputID) {
	document.getElementById('keyword').style.color = 'black';
}

function clear_field(inputID) {
	document.getElementById(inputID).value='';
}

function display_dropdown(drop_down_name){
	document.getElementById(drop_down_name).style.margin='0em';
}

function dropdown_disappear(drop_down_name){
	document.getElementById(drop_down_name).style.margin='0em 0em 0em -999em';
}