function divAcKapa(i,n) {
		if (document.getElementById("tab_" + i).style.display == "none") {
			document.getElementById("tab_" + i).style.display = "block";
			for (c=1; c<=n; c++) {
				if (i != c) {
					document.getElementById("tab_" + c).style.display = "none";
				}
			}
		} else {
			document.getElementById("tab_" + i).style.display = "none";
		}
	}
	
	function BosGecme(KutuAd,Sayi,HataMesaji){
		if (KutuAd.value == "" || KutuAd.value.length < Sayi){
			alert(HataMesaji);
			KutuAd.focus();
			return false;
		}
	}
	
	function MailKontrol(glnMail,HataMsj){
		var Suzgec  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (Suzgec.test(glnMail.value)) 
			return true;
		else 
			alert(HataMsj);
			glnMail.focus();
			return false;
	}