var i=0;
function StarHover(id){
	for (i=1;i<=5;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'bottom';
	}
	for (i=1;i<=id;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'top';
	}
}
function StarUnHover(){
	var id = document.forms['CommentForm'].Rating.value;
	for (i=1;i<=5;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'bottom';
	}
	for (i=1;i<=id;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'top';
	}
}
function StarClick(id){
	document.forms['CommentForm'].Rating.value = id;
	for (i=1;i<=5;i++){
		document.getElementById('star'+i).onmouseover = '';
	}
	for (i=1;i<=5;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'bottom';
	}
	for (i=1;i<=id;i++){
		document.getElementById('star'+i).style.backgroundPosition = 'top';
	}
}

function validate_required(field,alerttxt){
	with (field){
		if (value==null||value==""){
			alert(alerttxt);return false;
		} else {
			return true;
		}
	}
}

function checkAll(name){
	var checks = document.getElementsByName(name);
	var boxLength = checks.length;
	if ( document.getElementById('checkAllBox').checked == true ) {
		for ( i=0; i < boxLength; i++ ) {
			checks[i].checked = true;
		}
	} else {
		for ( i=0; i < boxLength; i++ ) {
			checks[i].checked = false;
		}
	}
}