/**
 * @author Matthew.Ma
 */

function onMessageChange(e) {
	var remaining = $('remaining');
	if (this.value.length > 1000)
	{
		this.value = this.value.substr(0,1000);
		remaining.innerHTML = 0;
	}
	else
	{
		remaining.innerHTML = 1000 - this.value.length;
	}
}

// initEvent methods
function initMessageEvents(){
    var messageArea = $('message');
    var remaining = $('remaining');
    remaining.innerHTML = 1000 - messageArea.value.length;
	$E.addListener(messageArea, "keyup", onMessageChange);
}

//run the init function
YAHOO.util.Event.addListener(window, "load", initMessageEvents);