function filterInteger(e) {
    key = e.which;
    if (key==undefined)
        key = e.keyCode;	
    if (key==0||key==8||key==13||key==45||key >47 && key<58)
	{
        return true;
    }
    return false;  
}

function filterFloat(e) {
    key = e.which;
    if (key==undefined)
        key = e.keyCode;		
		
    if (key==0||key==8||key==13||key==45||key==46 || key >47 && key<58)
        return true;
    return false;  
}