// get_selection():
	// liest den Text der Selection aus und gibt ihn zurück.
	
	function get_selection(id){
		var myField = '';
		if(document.getElementById(id) != null){
			myField = document.getElementById(id);
		} else {
			if(opener.document.getElementById(id) != null){
				myField = opener.document.getElementById(id);
			}
		}
		
		var select = '';

		if(myField != ''){		
			if (document.selection) {
				myField.focus();
				select = document.selection.createRange();
			} else {
				if (myField.selectionStart || myField.selectionStart == '0') {
					var startPos = myField.selectionStart;
					var endPos = myField.selectionEnd;
					select = myField.value.substr(startPos, (endPos - startPos));
				}
			}
		}
		
		if (!select || select == '') {
			return false; // Keine Markierung.
		} else {
			return select;
		}
	}