function limitchar(field,maxlength,counter)
{
	var retVal ;
	if(field.value.length > maxlength) 
	{
		field.value = field.value.substring(0, maxlength);
		retVal = false;
	}
	else
	{
		retVal = true ;
	}
	if ( counter != null )
	{
		counter.value = maxlength - field.value.length + ' characters left';
	}
	return retVal;
}

function checkcourseselection(element) 
{
	if(element.value == 'Select Course...') 
	{
		alert('Please select course');
		element.focus();
		return false;
	} else {
		return true;
	}
}
function checkpublicemail(element) 
{
	if(element.value!="") 
	{
		var val = element.value;
		var sDomain = val.substring(val.indexOf("@")+1);
		//alert(sDomain);
		if( (sDomain.toLowerCase().indexOf("yahoo") > -1) || (sDomain.toLowerCase().indexOf("gmail") > -1) || (sDomain.toLowerCase().indexOf("hotmail") > -1) || (sDomain.toLowerCase().indexOf("msn") > -1) || (sDomain.toLowerCase().indexOf("aol") > -1) || (sDomain.toLowerCase().indexOf("comcast") > -1) ) 
		{
			alert("Public email addresses (e.g., gmail, yahoo, hotmail) are not accepted!");
			element.focus();
			element.select();
			return false;
		}
	}
	return true;
}
function showcreditcard() 
{
	var ele = document.getElementById('tblCheck'); 
	ele.style.display='none';
	var ele = document.getElementById('tblCreditCard'); 
	ele.style.display='block';
}
function showcheck() 
{
	var ele = document.getElementById('tblCheck'); 
	ele.style.display='block';
	var ele = document.getElementById('tblCreditCard'); 
	ele.style.display='none';
}

function checkIfCbRSelected()
{
	var isChecked = false;
	for (var i = 1; i < 11; i++) {
		box = eval("document.forms[0].CheckBox" + i); 
		if (box.checked == true) 
		{
			isChecked = true;
			return true;
		}
	}
	if(!isChecked) 
	{
		alert("Please select atleast one class!");
		document.forms[0].CheckBox2.focus();
		return false;
	}
return false;	
}