@mixin linearGradientV($property_name, $top, $bottom){
    #{$property_name}: $top; /* Old browsers */
    #{$property_name}: -moz-linear-gradient(top,  $top 0%, $bottom 100%); /* FF3.6+ */
    #{$property_name}: -webkit-linear-gradient(top,  $top 0%,$bottom 100%); /* Chrome10+,Safari5.1+ */
    #{$property_name}: -o-linear-gradient(top,  $top 0%,$bottom 100%); /* Opera 11.10+ */
    #{$property_name}: -ms-linear-gradient(top,  $top 0%,$bottom 100%); /* IE10+ */
    #{$property_name}: linear-gradient(to bottom,  $top 0%,$bottom 100%); /* W3C */
}

@mixin linearGradientH($property_name, $left, $right){
    #{$property_name}: $left; /* Old browsers */
    #{$property_name}: -moz-linear-gradient(left,  $left 0%, $right 100%); /* FF3.6+ */
    #{$property_name}: -webkit-linear-gradient(left,  $left 0%,$right 100%); /* Chrome10+,Safari5.1+ */
    #{$property_name}: -o-linear-gradient(left,  $left 0%,$right 100%); /* Opera 11.10+ */
    #{$property_name}: -ms-linear-gradient(left,  $left 0%,$right 100%); /* IE10+ */
    #{$property_name}: linear-gradient(to right,  $left 0%,$right 100%); /* W3C */
}

@mixin venderPrefix($property_name, $value) {
  #{$property_name}: $value;
  -webkit-#{$property_name}: $value;
  -moz-#{$property_name}: $value;
  -ms-#{$property_name}: $value;
  -o-#{$property_name}: $value;
}
