function Form (name)
{
	this.name = name ? name : 0;
	
	// Fokus auf erstes Text-element setzen
	// Parameter: name - (optional) name des elementes
	this.focus = function (name)
	{
		top.focus ();
		
		if (name) {
			var element = document.getElementById (name);
			if (element && element.focus) {
				element.focus ();
			}
		} else {
			var form = document.forms[this.name];
			for (var i=0; form.elements[i]; i++) {
				if (form.elements[i].type != "hidden") {
					try {
						form.elements[i].focus ();
						return;
					} catch (e) {};
				}
			}
		}
	}
	
	
	this.get = function (name, defaultValue)
	{
		var element = document.getElementById (name);
		
		if (element) {
			switch (element.type) {
			case "text":
			case "textarea":
			case "file":
			case "password":
			case "hidden":
				return element.value;
			case "checkbox":
				return (element.checked) ? element.value : "";
			case "radio":
				element = this.getElement (name);
				for (var i=0; i<element.length; i++) {
					if( element[i].checked ) {
						return element[i].value;
					}
				}
				return "";
			case "select-one":
				return element.options[element.options.selectedIndex].value;
			case "select-multiple":
				var value = "";
				element = this.getElement (name);
				for (var i=0; i<element.length; i++) {
					if (element[i].selected) {
						value += "," + element[i].value;
					}
				}
				return value.substr (1);
			}
		} else if (typeof defaultValue == "undefined") {
			d ("Unknown form element: "+name);
		}
		return defaultValue ? defaultValue : "";
	}
	
	this.set = function (name, value, ignoreMissingElement)
	{
		var element = document.getElementById (name);
		
		if (!element) {
			if (!ignoreMissingElement) {
				d ("Unknown form element: "+name);
			}
			return;
		}
		
		switch (element.type) {
		case "text":
		case "textarea":
		case "file":
		case "password":
		case "hidden":
			element.value = value;
			break;
		case "checkbox":
			if( value==-1 ) { // buttons umkehren
				element.checked = !element.checked;
			} else {
				element.checked = value;
			}
			break;
		case "radio":
			element = this.getElement (name);
			for (var i=0; i<element.length; i++) {
				if( !value ) {
					element[i].checked = false;
				}
				if( element[i].value==value ) {
					element[i].checked = true;
				}
			}
			break;
		case "select-one":
		case "select-multiple":
			if( value==-1 ) {
				element.selectedIndex = -1;
			} else {
				element = this.getElement (name);
				for (var i=0; i<element.length; i++) {
					if ((","+value+",").indexOf (","+element[i].value+",")!=-1) {
						element[i].selected = true;
						if (element.type=="select-one") {
							break;
						}
					} else {
						element[i].selected = false;
					}
				}
			}
			break;
		}
	}

	this.selectAndInput = function (name)
	{
		var select = document.getElementById (name);
		var width = select.offsetWidth;
		select.style.position = "absolute";
		select.style.width = width;
		select.style.marginLeft = -width;
		select.style.clip = "rect(0,"+width+", 30, "+(width-17)+")";
	}
	
	this.getElement = function (name)
	{
		if (this.name) {
			return document.forms[this.name].elements[name];
		}
		for (var i=0; i<document.forms.length; i++) {
			if (document.forms[i].elements[name]) {
				return document.forms[i].elements[name];
			}
		}
		return [];
	}
}