//browser detection
var strUserAgent = navigator.userAgent.toLowerCase(); 
var isIE = strUserAgent.indexOf("msie") > -1; 

function checkMaxLength(objEvent, elementId) {
	var iKeyCode, strKey;  
				
	if (isIE) {
	    iKeyCode = objEvent.keyCode;
	} else {
	    iKeyCode = objEvent.which;
	}
					
	textarea = document.getElementById(elementId);

	if (textarea.value.length >= 250) {
		// only let backspace through
		if (iKeyCode == 8) {
			return true;
		}
		
		return false;
	}
	
	return true;
}