}

	this.render = function(data,pad) {

		var idx = 1;

		var rela = document.getElementById('graph');

		var pad = pad;

		var scale = 22;

		for (var i in data) {

			this.scale(scale);

			var row = document.getElementById("chg_"+idx);

			var	next = document.getElementById("chg_"+(idx+1));

			var extra = 0;

			this.cell[1] += row.clientWidth;

			this.bg[1] += this.bg_height;

			cur = data[i];

			nodeid = cur[0];

			node = cur[1];

			in_l = cur[2];

			var rowY = row.offsetTop + row.offsetHeight/2 - rela.offsetTop;