String.prototype.trim = function() {
	return this.replace(/(^\s*)|(\s*$)/g, "");
}

function check_email(str) {
	var re = /^[a-zA-Z0-9\-\_\.]{1,}@[A-Za-z0-9\_\-\.]{2,}\.[A-Za-z]{2,4}$/  
	if (str.match(re) == null)  {
		return false;
	} 	
	else {
		return true;
	}
}

function big_plan(){
	w=740;
	ht=615;
	source="/tpls/big_plan.php";
	window_name="plan";
	ws=screen.availWidth;
	hs=screen.availHeight;
	kl=(ws-w)/2;
	if (kl<0){kl=0;}
	kt=(hs-ht)/2;
	if (kt<0){kt=0;}
	var window_params = 'status=no,toolbar=no,scrollbars=yes,titlebar=yes,menubar=no,resizable=yes,width='+w+',height='+ht+',left='+kl+',top='+kt+',directories=no,location=no';
	window.open(source, window_name, window_params);	
 }