function textarea_onkeydown(obj,maxlength) {

	if (obj.value.length >= maxlength ){
	
		 if (event.keyCode == 8){
		    event.returnValue=true
		 }
		 else if (event.keyCode == 46){
		    event.returnValue=true
		 }
		 else{
        event.returnValue=false
		}
	}
}

function textarea_onbeforepaste(obj,maxlength) {
	 var textLength = clipboardData.getData('text').length + obj.innerHTML.length 
	 
	 if (textLength > maxlength){
		event.returnValue=false
		return false
	 }
}