.opac-20{
    filter:alpha(opacity=20); /* IE */  
    -moz-opacity:0.2; /* Mozilla */ 
    opacity: 0.2; 
    filter:alpha(opacity=20);
}
.opac-30{
    filter:alpha(opacity=30); /* IE */  
    -moz-opacity:0.3; /* Mozilla */ 
    opacity: 0.3; 
    filter:alpha(opacity=30);
}
.opac-40{
    filter:alpha(opacity=40); /* IE */  
    -moz-opacity:0.4; /* Mozilla */ 
    opacity: 0.4; 
    filter:alpha(opacity=40);
}
.opac-50{
    filter:alpha(opacity=50); /* IE */  
    -moz-opacity:0.5; /* Mozilla */ 
    opacity: 0.5; 
    filter:alpha(opacity=50);
}
.opac-60{
    filter:alpha(opacity=60); /* IE */  
    -moz-opacity:0.6; /* Mozilla */ 
    opacity: 0.6; 
    filter:alpha(opacity=60);
}
.opac-70{
    filter:alpha(opacity=70); /* IE */  
    -moz-opacity:0.67; /* Mozilla */ 
    opacity: 0.7; 
    filter:alpha(opacity=70);
}.opac-80{
    filter:alpha(opacity=80); /* IE */  
    -moz-opacity:0.8; /* Mozilla */ 
    opacity: 0.8; 
    filter:alpha(opacity=80);
}.opac-90{
    filter:alpha(opacity=90); /* IE */  
    -moz-opacity:0.9; /* Mozilla */ 
    opacity: 0.9; 
    filter:alpha(opacity=90);
}
.opac-100{
    filter:alpha(opacity=100); /* IE */  
    -moz-opacity:0.6; /* Mozilla */ 
    opacity: 1; 
    filter:alpha(opacity=100);
}