function showimage(img_name, img_tag)
{
	document.getElementById(img_tag).src = 'upload/'+img_name;
}
var glad_page = false;
var dem_page_gallery = 1;
function change_page_next(arr, limit, area, glad)
{
	if(glad>1)
		this.glad_page=true;
	
	if(this.glad_page)
	{
		document.getElementById(area).innerHTML=arr[this.dem_page_gallery];
		
		this.dem_page_gallery+=1;
		if(this.dem_page_gallery == limit)
			this.dem_page_gallery =limit-1;
		
	}
}
function change_page_prev(arr, limit, area, glad)
{
	if(glad>1)
		this.glad_page=true;
	
	if(this.glad_page)
	{
		document.getElementById(area).innerHTML=arr[this.dem_page_gallery];
		
		this.dem_page_gallery -=1;
		if(this.dem_page_gallery < 0)
			this.dem_page_gallery=0;
		
	}
}