function size_screen() {
	window.moveTo(0,0);
	window.resizeTo(screen.availWidth,screen.availHeight);
}
	
function popup(address,winurl,winwidth,winheight) {
	var new_window = window.open(address,winurl,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width=' + winwidth + ',height=' + winheight);
}

/* Image Pre-loading & Rollovers */
function MM_swapImgRestore() { //v2.0
  if (document.MM_swapImgData != null)
		for (var i=0; i<(document.MM_swapImgData.length-1); i+=2)
			document.MM_swapImgData[i].src = document.MM_swapImgData[i+1];
}
function MM_preloadImages() { //v2.0
  if (document.images) {
    var imgFiles = MM_preloadImages.arguments;
    if (document.preloadArray==null) document.preloadArray = new Array();
    var i = document.preloadArray.length;
    with (document) for (var j=0; j<imgFiles.length; j++) if (imgFiles[j].charAt(0)!="#"){
      preloadArray[i] = new Image;
      preloadArray[i++].src = imgFiles[j];
  	}
  }
}
function MM_swapImage() { //v2.0
  var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.MM_swapImgData;
  for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
    objStr = MM_swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
    if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
        (objStr.indexOf('document.all[')   ==0 && document.all   ==null))
      objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
    obj = eval(objStr);
    if (obj != null) {
      swapArray[j++] = obj;
      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
      obj.src = MM_swapImage.arguments[i+2];
  	}
  }
  document.MM_swapImgData = swapArray; //used for restore
}

/* Validation */
function validateForm() {
	var errormessage = 'Please ensure that you have completed the following:\n';
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	
	if((document.commentform.comment_email.value != '') && (filter.test(document.commentform.comment_email.value)) && (document.commentform.comment_name.value != '') && (document.commentform.comment_msg.value != '')) {
			document.commentform.submit();
	} else {
		if(document.commentform.comment_email.value == '') {
			errormessage += "  > Email address\n";
		} else {
			if((filter.test(document.commentform.comment_email.value)) == false) {
				errormessage += "  > You must enter a valid email address\n";
			}
		}
		if(document.commentform.comment_name.value == '') {
			errormessage += "  > Your name\n";
		}
		if(document.commentform.comment_msg.value == '') {
			errormessage += "  > Your message\n";
		}
		alert(errormessage);
	}
}