/* ======================================================================*/
//@Command([ViewPageDown])
function goNext(dataFrame, Max) {
     var theForm = dataFrame.document.forms[dataFrame.document.forms.length - 1];
     var href = dataFrame.location.href.toLowerCase();
     category = getParam(href, '&restricttocategory=', '')
  	firstPos = href.lastIndexOf('&start=');
  	if (firstPos == -1) {
		start = 1;
  	} else {
  		lastPos = href.indexOf('&', firstPos+1)
  		if (lastPos == -1) {lastPos = href.length;}
  		start = parseInt(href.substring(firstPos+7, lastPos))
  	}
	count = parseInt(getParam(href, '&count=', '30'));
	newstart = start+count
	if(newstart > Max){
	newstart=start
	}
	if(category=='') {
		newUrl = '?Open&Start='+newstart+'&Count='+count
	} else {
		newUrl = '?Open&RestrictToCategory='+category+'&Start='+newstart+'&Count='+count;
	}
	dataFrame.location.replace(dataFrame.location.href.split('?')[0]+newUrl)
}
/* ======================================================================*/
// @Command([ViewPageUp])
function goBack(dataFrame) {
	var theForm = dataFrame.document.forms[dataFrame.document.forms.length-1];
	var href = dataFrame.location.href.toLowerCase();
	category = getParam(href, '&restricttocategory=', '')
	start = parseInt(getParam(href, '&start=', '1'))
	count = parseInt(getParam(href, '&count=', '30'));
	newstart = (start-count > 0) ? start - count : 1;
	if (category=='') {
		newUrl = '?Open&Start='+newstart+'&Count='+count
	} else {
		newUrl = '?Open&RestrictToCategory='+category+'&Start='+newstart+'&Count='+count;
	}
	//alert(newUrl)
	dataFrame.location.replace(dataFrame.location.href.split('?')[0]+newUrl)
}
//
/* ======================================================================*/
function getParam(url, beginstr, defaultval) {
	firstPos = url.lastIndexOf(beginstr);
	if (firstPos == -1) {
		return defaultval;
	} else {
		lastPos = url.indexOf('&', firstPos +1)
		if (lastPos==-1) lastPos = url.length;
		return url.substring(firstPos+beginstr.length, lastPos)
	}
}