function clearField(obj) {
	if (obj.defaultValue==obj.value) obj.value = '';
}

function setDisplay(objectID,state) {
	var object = document.getElementById(objectID);
	object.style.display = state;
}

function toggleDisplay(objectID) {
	var object = document.getElementById(objectID);
	state = object.style.display;
	if (state == 'none')
		object.style.display = 'block';
	else if (state != 'none')
		object.style.display = 'none'; 
}
	
function chooseCat(requestedData,objectID) {
	fetchData('dataPage.php',requestedData,objectID);
	setDisplay('chesh','inline');
	
}

function chooseApp(requestedData,objectID) {
	fetchData('dataPageM.php',requestedData,objectID);
	setDisplay('mesh','inline');
	
}

function chooseAppO(requestedData,objectID) {
	fetchData('dataPageO.php',requestedData,objectID);
	setDisplay('obesh','inline');
	
}

function chooseAppP(requestedData,objectID) {
	fetchData('dataPageP.php',requestedData,objectID);
	setDisplay('pesh','inline');
	
}

function filterData(pageRequest,objectID){	
	if (pageRequest.readyState == 4 && (pageRequest.status==200 || window.location.href.indexOf("http")==-1)) {
		var object = document.getElementById(objectID);
		object.options.length = 0;
		if(pageRequest.responseText != '') {
			var arrSecondaryData = pageRequest.responseText.split(',');
			for(i = 0; i < arrSecondaryData.length; i++) {
				if(arrSecondaryData[i] != '')
					object.options[object.options.length] = new Option(arrSecondaryData[i], arrSecondaryData[i]);
}}}}

function checkform() {
	if (document.addc.valList.options[document.addc.valList.selectedIndex].value=="") {
		
		alert('Please Select a size.');
		document.addc.valList.focus();
		return false;
	
		} else {
	
		return true;
		}
}