var myimg = new Array();
for (i = 1; i < cats.length; i++) {
	myimg['icnon' + i] = new Image();
	myimg['icnon' + i].src = 'images/srchicons/tab' + i + '-on.jpg';
	myimg['icnoff' + i] = new Image();
	myimg['icnoff' + i].src = 'images/srchicons/tab' + i + '-off.jpg';
}

function setcategory(id) {
	if(cats[id] != undefined) {
		if (document.getElementById) {
			var obj = document.getElementById('catselect');
			obj.innerHTML = cats[id];
			//update pics
			for (i = 1; i < cats.length; i++) {
				var img = document.getElementById('ico' + i);
				if (i == id) {
					img.src = myimg['icnon' + i].src;
				} else {
					img.src = myimg['icnoff' + i].src;
				}
			}
			return false;
		}
	}
	return true;
}

function isNumberKey(evt) {
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57)) {
		return false;
	}
	return true;
}
	  
function isNumInit(obj, val) {
	if (obj.value == val) {
		obj.value = '';
		return false;
	}
    return true;
}

function NumReInit(obj, val) {
	if (obj.value == '') {
		obj.value = val;
		return false;
	}
    return true;
}