function switchMenu(obj) {
		var el = document.getElementById(obj);
		if ( el.style.display != "none" ) {
			el.style.display = 'none';
		}else {
			el.style.display = '';
		}
	}
	
	//hides an object such as div/table/etc
	function hideObject(obj) {
		var el = document.getElementById(obj);
		el.style.display = 'none';
	}	 
	
	//hides an object such as div/table/etc
	function showObject(obj) {
		var el = document.getElementById(obj);
		el.style.display = '';
	}

	
	function selectAll(formObj, isInverse){
   		for (var i=0;i < formObj.length;i++){
      		fldObj = formObj.elements[i];
      		if (fldObj.type == 'checkbox'){ 
         		if(isInverse) fldObj.checked = (fldObj.checked) ? false : true;
         		else fldObj.checked = true; 
			}
   		}
   	}
	
	function bookmarksite(title,url){
		if (window.sidebar) // firefox
			window.sidebar.addPanel(title, url, "");
		else if(window.opera && window.print){ // opera
			var elem = document.createElement('a');
			elem.setAttribute('href',url);
			elem.setAttribute('title',title);
			elem.setAttribute('rel','sidebar');
			elem.click();
		} 
		else if(document.all)// ie
			window.external.AddFavorite(url, title);
	}
	
	function pausecomp(millis){
		var date = new Date();
		var curDate = null;

		do { curDate = new Date(); }
			while(curDate-date < millis);
	}
	
	function show_hide_column(table_name,col_name, do_show) {

		var stl;
		if (do_show) stl = 'block'
		else         stl = 'none';
	
		var tbl  = document.getElementById(table_name);
		var cels = tbl.getElementsByTagName('td');
	
		for (var row=0; row<cels.length;row++) {
		  if(cels[row].id !== null && cels[row].id==col_name){
			  cels[row].style.display=stl;
		  }
		}
  }