/**
 * javascript HashMap
 * 
 * @author Wangt
 * Create By 2007-10-13 13:46:32
 */
function HashMap() {
	this.elements = new Array();
	this.size = function () {
		return this.elements.length;
	};
	this.isEmpty = function () {
		return (this.elements.length < 1);
	};
	this.clear = function () {
		this.elements = new Array();
	};
	this.put = function (_key, _value) {
		this.elements.push({key:_key, value:_value});
	};
	this.remove = function (_key) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					this.elements.splice(i, 1);
					return true;
				}
			}
		}
		catch (e) {
			bln = false;
		}
		return bln;
	};
	this.get = function (_key) {
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					return this.elements[i].value;
				}
			}
		}
		catch (e) {
			return null;
		}
	};
	this.element = function (_index) {
		if (_index < 0 || _index >= this.elements.length) {
			return null;
		}
		return this.elements[_index];
	};
	this.containsKey = function (_key) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].key == _key) {
					bln = true;
				}
			}
		}
		catch (e) {
			bln = false;
		}
		return bln;
	};
	this.containsValue = function (_value) {
		var bln = false;
		try {
			for (i = 0; i < this.elements.length; i++) {
				if (this.elements[i].value == _value) {
					bln = true;
				}
			}
		}
		catch (e) {
			bln = false;
		}
		return bln;
	};
	this.values = function () {
		var arr = new Array();
		for (i = 0; i < this.elements.length; i++) {
			arr.push(this.elements[i].value);
		}
		return arr;
	};
	this.keys = function () {
		var arr = new Array();
		for (i = 0; i < this.elements.length; i++) {
			arr.push(this.elements[i].key);
		}
		return arr;
	};
}