function do_login () {
		my=document.login.code.value;
		my=my.substring((0),(4));
			pword=validate()	
			if(my !=""){
				if (my==pword) {
					document.location.href=document.login.code.value+".htm"
				}
				else {
					document.location.href="fail.htm"
				}
	}

	}


	function validate() {
		i=0;
		h= new Array
		x="7ft0vfdw0e66yi0h8rtyz0123456e0aprf157f12cem1234xnn0agg";
		a=x.split("0");
		f=x.substring((40),(47)); 
		while (i<=5) 
			{	
				y=a[i];	y=y.substring((2+i),(3+i));h[i]=y;i++
			}
		 h.reverse(); z=h.join("");return(z.substring((2),(6)));
		return a;
	}