// JavaScript Document
function checkform(o){
	var obj = eval('document.'+o);
	var err = 'An error has occurred.\n\n';
	var eno = 0;
	if (obj.longurl) {
		if (trim(obj.longurl.value) == '') {
			eno ++;
			err +=  'Please enter a valid URL.\n';
		}
	}
	if (eno > 0) {
		alert(err);
		return false;
	}
}
function docheck(){
	var longurl=getElementById(longurl).value;
	if(trim(longurl)){
		alert('Please enter a valid URL');
		return false;
	}
}
function trim(str) {
	return str.replace(/(^\s*)|(\s*$)/g,'');
}