Object Constructor

var mySlider = new dhtmlXSlider({
    parent:     "objId",
    size:       150,
    value:      5,
    step:       1,
    min:        -10,
    max:        150,
    vertical:   true,
    linkTo:     "inp",
    inverse:    true
});

where

parent - (id) id of an HTML element which will be used as parent (or object itself), mandatory
linkTo - (string|object) links slider to other control (linkTo())
size - (number) size in pixels (slider adjusts to the container's size by default)
skin - (string) name of the skin, optional
vertical - (boolean) if set to true, slider will be rendered as a vertical one, false by default
min - (number) min value of slider, 0 by default
max - (number) max value of slider, 99 by default
value - (number) current value of slider, 0 by default
step - (number) step of slider, 1 by default
disabled - (boolean) if set to true, slider is initially inactive, to make it active call the enable() method, false by default
tooltip - (boolean) if true, a tooltip with the current slider's value is displayed on hovering a mouse pointer over the handler, false by default
visible - (boolean) if set to false, slider is initially hidden and will be shown on calling the method show(), true by default
inverse - (boolean) if set to true, the slider shows values from max to min (added in version 4.1)

<div id='my_slider_here'></div>
<script>    //common init code
    var mySlider = new dhtmlXSlider({parent: "my_slider_here", size: 100});
</script>

There's also a possibility to initialize slider by passing a set of arguments.

var mySlider = new dhtmlXSlider(parent,size,skin,vertical,min,max,value,step);

Related sample: Init from object