var verifyImage;
var targetImage;
var verifyTimer;
var verifyTimer_value = 500;

function validateComment(theForm) {
	if(theForm.commentContent) {
		if(theForm.commentContent.value=="") {
			alert("You must enter a comment!");
			theForm.commentContent.focus();
			return false;
		}
		
		if(theForm.commentContent.value.length>255) {
			alert("Your comment can not be longer than 255 characters!");
			theForm.commentContent.focus();
			return false;
		}
		
		if(theForm.verifyCode && theForm.verifyCode.value=="") {
			alert("Verify code is required!");
			theForm.verifyCode.focus();
			return false;
		}
	}	
	return true;
}

function refreshVerifyCode(imageId) {
	var temp 	= Math.round(Math.random() * 100000);
	verifyImage	= document.getElementById(imageId);
	if(!verifyImage)
		return;
	var url		=	verifyImage.src;
	var pos		=	url.indexOf("?");
	if(pos>0)
		url			=	url.substr(0, pos);
	url = url + "?refresh=" + temp;
	targetImage		= new Image;
	targetImage.src = url;
	verifyTimer = setTimeout("waitForImageLoad();", verifyTimer_value);
}

function waitForImageLoad() {
	clearTimeout(verifyTimer);
	if(!targetImage.complete) {		
		verifyTimer = setTimeout("waitForImageLoad();", verifyTimer_value);
	}
	else {
		verifyImage.src = targetImage.src;
	}
}