diff --git a/pmd/scripts/history.js b/pmd/scripts/history.js
new file mode 100644
index 000000000..f254285c1
--- /dev/null
+++ b/pmd/scripts/history.js
@@ -0,0 +1,81 @@
+var history_array = [];
+ function history(ncolumn_name,nobj,ntab,nobj_no) {
+	var and_or;
+	var obj;
+	var tab;
+	var column_name;
+	var obj_no;
+	this.setcolumn_name = function (ncolumn_name) {
+		column_name = ncolumn_name;
+	};
+	this.getcolumn_name = function() {
+		return column_name;
+	};
+	this.set_and_or = function(nand_or) {
+		and_or = nand_or;
+	};
+	this.get_relation = function() {
+		return and_or;
+	};
+	this.set_obj = function(nobj) {
+		obj = nobj;
+	};
+	this.get_obj = function() {
+		return obj;
+	};
+	this.set_tab = function(ntab) {
+		tab = ntab;
+	};
+	this.get_tab = function() {
+		return obj;
+	};
+	this.set_obj_no = function(nobj_no) {
+		obj_no = nobj_no;
+	};
+	this.get_obj_no = function() {
+		return obj_no;
+	};
+
+	this.set_obj_no(nobj_no);
+	this.set_tab(ntab);
+	this.set_and_or(0);
+	this.set_obj(nobj);
+	this.setcolumn_name(ncolumn_name);
+};
+
+var where = function (nrelation_operator,nquery) {
+	var relation_operator;
+	var query;
+	this.setrelation_operator = function(nrelation_operator) {
+		relation_operator = nrelation_operator;
+	};
+	this.setquery = function(nquery) {
+		query = nquery;
+	};
+	this.getquery = function() {
+		return query;
+	};
+	this.getrelation_operator = function() {
+		return relation_opearator;
+	};
+	this.setquery(nquery);
+	this.setrelation_operator(nrelation_operator);
+};
+
+var rename = function(nrename_to) {
+	var rename_to;
+	this.setrename_to = function(nrename_to) {
+		rename_to = nrename_to;
+	};
+	this.getrename_to =function() {
+		return rename_to;
+	};
+	this.setrename_to(nrename_to);
+};
+var aggregate = function(noperator) {
+	var operator;
+	this.set_operator = function(noperator) {
+		operator=noperator;
+	};
+	this.set_operator(noperator);
+};