function rolloverButtons(img_name, img_src){
	if(document[img_name].src != img_src){
		document[img_name].src = img_src;
	}
}

function rolloverSubButtons(div_name, img_src) {
	document.getElementById(div_name).style.backgroundImage = "url(" + img_src + ")";
}

function limitText(limitField, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	}
}

function loginFunction(){
	var pageName = document.loginForm.usernameTxtLoginForm.value;
	if(pageName == "user"){
		location.href = 'index.php?page=userHome&menu=user';
	} else if(document.loginForm.usernameTxtLoginForm.value == "admin"){
		location.href = 'index.php?page=adminHome&menu=admin';
	} else {
		location.href = 'index.php?page=userFailed';
	}	
}

function confirmDialog(urlVar) {
	myLeft=(screen.width)?(screen.width-400)/2:100;
	myTop=(screen.height)?(screen.height-50)/2:100;
	popupWindow = window.open (urlVar, 'Admin Confirmation', 'top='+myTop+',left='+myLeft+',toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=400,height=50');
}

function imagePreview(urlVar) {
	myLeft=(screen.width)?(screen.width-900)/2:100;
	myTop=(screen.height)?(screen.height-800)/2:100;
	popupWindow = window.open (urlVar, 'Image Preview', 'top='+myTop+',left='+myLeft+',toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=900,height=800');
}