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

			function checkForm(obj){
				var errormsg = '';
				var ret_value = true;
				var reg=/[0-9a-z_]+@[0-9a-z_^.]+.[a-z]{2,3}/i;
		    if(reg.exec(document.getElementById('femail1').value) == null && document.getElementById('femail1').value !== '') {
		    	errormsg = 'Emails incorrect : #1';
		      ret_value = false;
		    }
		    if(reg.exec(document.getElementById('femail2').value) == null && document.getElementById('femail2').value !== '') {
		    	if(errormsg !=='')
		    		errormsg += ',#2';
		    	else
		    		errormsg = 'Emails incorrect : #2';
		      	ret_value = false;
		    }
		    if(reg.exec(document.getElementById('femail3').value) == null && document.getElementById('femail3').value !== '') {
		    	if(errormsg !=='')
		    		errormsg += ',#3';
		    	else
		    		errormsg = 'Emails incorrect: #3';
		      ret_value = false;
		    }
		    if(reg.exec(document.getElementById('email').value) == null && document.getElementById('email').value !== '') {
		    	if(errormsg !=='')
		    		errormsg += ',your mail';
		    	else
		    		errormsg = 'Emails incorrect: your email';
		      ret_value = false;
		    }
		    document.getElementById('error').style.display = 'block';
		    document.getElementById('error').innerHTML = errormsg;
				return ret_value;
			}
	function buy(id, exc){
		str = "&<?=session_name()?>=<?=session_id()?>";
		window.location.href="/cart.php?add="+ id + str;
	}

	function cart(s){
		str = "&<?=session_name()?>=<?=session_id()?>";
		window.location.href="/cart.php?"+ s + str;
	}
	function cartWithYourPrice(id, price){
		str = "&<?=session_name()?>=<?=session_id()?>";
		window.location.href="/cart.php?add="+ id + "&price="+ price + str;
	}