function limit_textarea(element,limitNum,limitDiv) {

	if (typeof element.scrollTop != 'undefined' && typeof element.scrollHeight != 'undefined') {
			
			if (element.value.length > limitNum) {
        		element.value = element.value.substring(0, limitNum);
        		element.scrollTop = element.scrollHeight;
        		document.getElementById(limitDiv).style.display = 'block';
        	} else {
        		document.getElementById(limitDiv).style.display = 'none';
        	}

	}

}