public/libs/jquery.selectbox.js
function (target) {
			var inst = this._getInst(target);
			if (!inst || inst.isDisabled) {
				return FALSE;
			}
			$("#sbHolder_" + inst.uid).addClass(inst.settings.classHolderDisabled);
			inst.isDisabled = TRUE;
			$.data(target, PROP_NAME, inst);
		}
function (target) {
			var inst = this._getInst(target);
			if (!inst || inst.isDisabled) {
				return FALSE;
			}
			$("#sbHolder_" + inst.uid).addClass(inst.settings.classHolderDisabled);
			inst.isDisabled = TRUE;
			$.data(target, PROP_NAME, inst);
		}
function ( target ) { var inst = this . _getInst ( target ) ; if ( ! inst || inst . isDisabled ) { return FALSE ; } $ ( "#sbHolder_" + inst . uid ) . addClass ( inst . settings . classHolderDisabled ) ; inst . isDisabled = TRUE ; $ . data ( target , PROP_NAME , inst ) ; }
Disable the selectbox.

@param {HTMLElement} target
Disable the selectbox .