function evalPwd(s)
{
	//s -> password string
	
	var cmpx = 0; //password security level
	
	if (s.length >= 6) //if the password is bigger than 6 characters
	{
		cmpx++; //increment cmpx
		
		if (s.search("[A-Z]") != -1) //if the password contain capitals
		{
			cmpx++; //increment cmpx
		}
		
		if (s.search("[0-9]") != -1) //if the password contain figures
		{
			cmpx++; //increment cmpx
		}
		
		if (s.length >= 8 || s.search("[\x20-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]") != -1) //if the password is bigger than 8 characters or contain special characters
		{
			cmpx++; //increment cmpx
		}
	}
	
	if (cmpx == 0) //no password or password very weak
	{
		document.getElementById("weak").className = "nrm";
		document.getElementById("medium").className = "nrm";
		document.getElementById("strong").className = "nrm";
	}
	else if (cmpx == 1) //the password is weak
	{
		document.getElementById("weak").className = "red";
		document.getElementById("medium").className = "nrm";
		document.getElementById("strong").className = "nrm";
	}
	else if (cmpx == 2) //the password is medium
	{
		document.getElementById("weak").className = "yellow";
		document.getElementById("medium").className = "yellow";
		document.getElementById("strong").className = "nrm";
	}
	else //the password is safe
	{
		document.getElementById("weak").className = "greenPwd";
		document.getElementById("medium").className = "greenPwd";
		document.getElementById("strong").className = "greenPwd";
	}
}