function trim(str) {
	var whitespace = new String(" \t\n\r");
	var s = new String(" " + str + " ");
	if (whitespace.indexOf(s.charAt(0)) != -1) {
		var j=0, i = s.length;
            while (j < i && whitespace.indexOf(s.charAt(j)) != -1) {
			j++;
		}
            s = s.substring(j, i);
	}

	if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
		var i = s.length - 1;       
            while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1) {
			i--;
		}
            s = s.substring(0, i+1);
	}
	return s;
}

function win(URL, w, h) { 
	swidth = (screen.width-w)/2;
	sheight = (screen.availHeight-h)/2
	var win_pic = window.open(URL,'win_pic','width='+w+',height='+h+',top=' + sheight + ',left=' + swidth + ',resizable=yes,scrollbars=yes,menubar=yes');
	win_pic.focus();
}