function obi(objn) {
		return document.getElementById(objn);
	}
	function showhide(id){ 
		obj = obi(id); 
		obj.style.display =  (obj.style.display == "none")?"":"none";
	} 
	function show(id){  
			obi(id).style.display = "";
	} 
	function hide(id){ 
		obi(id).style.display = "none";  
	}
	function sel_txt(obj) {
		obj.focus();
		obj.select();
	}		
	function str_replace(needle, replacement,haystack) {
	    var temp = haystack.split(needle);
	    return temp.join(replacement);
	}