var isDOM=document.getElementById //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
	var isMSIE=document.all && document.all.item //Microsoft Internet Explorer 4+
	var isNetscape4=document.layers //Netscape 4.*
	var isOpera=window.opera //Opera
	var isOpera5=isOpera && isDOM //Opera 5+
	var isMSIE5=isDOM && isMSIE && !isOpera //MSIE 5+
	var isMozilla=isNetscape6=isDOM && !isMSIE && !isOpera
	var isOpera7 = isDOM && isMSIE && isOpera5;

	function getScrollY(){
		if( isMozilla ){
			return Number(scrollY);
		}else{
			return Number(document.documentElement.scrollTop);
		}
	}
	function getScrollX(){
		if( isMozilla ){
			return Number(scrollX);
		}else{
			return Number(document.documentElement.scrollWidth);
		}
	}

	var sform = {
		showform : function( obj, form_id, position, t, b ){

			var new_x = 0;
			var new_y = 0;
			var vrscrollY = getScrollY();
			if( t==null ) t=0;
			if( b==null ) b=0;

			this.form  = document.getElementById(form_id);
			this.block = false;
			this.nclik = false;

			if (obj.pageX || obj.pageY) {
				new_x = obj.pageX;
				new_y = obj.pageY;
			}else if (obj.clientX || obj.clientY) {
				new_x = obj.clientX;
				new_y = obj.clientY + getScrollY();
			}else{

				if( this.objs != null ){
					if( this.objs == obj ){
						if( this.form.style.display != 'none'  ){
							this.closeform();
							return;
						}
					}
				}

				this.objs = obj;

				var left=0;
				var top=0;
				var obj_h = obj.offsetHeight;
				var obj_w = obj.offsetWidth;
				var obj_d = obj;
				while(obj){
					left += obj.offsetLeft;
					top += obj.offsetTop;
					if(obj.style.borderTopWidth != ''){
						top += parseInt(obj.style.borderTopWidth);
					}
					if(obj.style.borderLeftWidth!=''){
						left += parseInt(obj.style.borderLeftWidth);
					}
					obj=obj.offsetParent;
				}

				if( isMozilla ){
					mrg_x = obj_d.style.marginLeft;
					mrg_x = Number(mrg_x.replace( /px/i, '' ));
					mrg_y = obj_d.style.marginTop;
					mrg_y = Number(mrg_y.replace( /px/i, '' ));
				}else{
					mrg_x = mrg_y = 0;
				}

				// Определяем позицию вывода
				new_x = left + mrg_x;
				new_y = top  + mrg_y + obj_h+1;
				if( position == 'lb' ){
					new_x = left + mrg_x - obj_w-1;
					new_y = top  + mrg_y + obj_h+1;
				}else if( position == 'rt' ){
					new_x = left + mrg_x + obj_w+1;
					new_y = top  + mrg_y;
				}else if( position == 'rb' ){
					new_x = left + mrg_x + obj_w+1;
					new_y = top  + mrg_y + obj_h;
				}
			}

			document.getElementById(form_id).style.display    = 'block';
			document.getElementById(form_id).style.visibility = 'visible';
			document.getElementById(form_id).style.left = new_x+b+'px';
			document.getElementById(form_id).style.top  = new_y+t+'px';

		},
		hideform : function(){
			if( this.nclik  && !this.block ){
				this.objs = null;
				if( this.form!=null ) this.form.style.display = 'none';
			}else{
				this.nclik = true;
			}
		},
		closeform : function(){
			if( this.form!=null ){
				this.objs = null;
				this.form.style.display = 'none';
			}
		}
	}